Application of Applied Behavior Analysis to Mental Health Issu.docx

Application of Applied Behavior Analysis to Mental Health
Issues
Mark T. Harvey
Florida Institute of Technology
James K. Luiselli
The May Institute, Inc.
Stephen E. Wong
Florida International University
The theoretical and conceptual basis for behavior analysis
emerged from the fields of
experimental psychology, physiology, and philosophy,
effectively melding theory with
scientific rigor. Behavior analysis has since expanded from
controlled laboratories into
applied settings, including hospitals, clinics, schools, family
homes, and communities.
Much of the early research in applied behavior analysis (ABA)
included participants
with mental health disorders and developmental disabilities.
ABA research for persons
with developmental disabilities is vibrant and expansive;
however, there is a paucity of
recent research in behavior analytic assessment and treatment
for persons with mental
health diagnoses. This article describes how ABA technology
can advance mental
health services for children and adults utilizing a
multidisciplinary approach to link

professionals from psychology, psychiatry, and other associated
disciplines to optimize
patient outcomes. Discussion focuses on historic applications of
behavior analysis,
opportunities, and barriers in the mental health field, and ways
in which ABA can
contribute to a multidisciplinary treatment approach.
Keywords: applied behavior analysis, functional behavior
assessment, functional analysis, con-
tingency management, acceptance and commitment therapy
The etiology of mental illness is believed to
be a complex interaction between genetics,
physiology, neurobiology, and environmental
factors that lead to psychological, physiologi-
cal, and/or behavioral changes. When these de-
viations differ significantly from societal norms
and interfere with one’s ability to function in
daily life, the person may be diagnosed with a
mental disorder (American Psychiatric Associ-
ation, 2000). Often a licensed physician, psy-
chiatrist, or psychologist assesses an individual,
diagnoses a mental disorder, and then desig-
nates a treatment plan for that individual. Al-
though an interdisciplinary approach, wherein
representatives from various disciplines such as
medicine, psychiatry, clinical psychology, neu-
roscience, education, social work, and behavior
analysis convene to devise a treatment plan
would be preferable, the logistics and resources
required limit this practice to select clinical
facilities. We posit that behavior analysis,
which includes refined techniques for teaching
and motivating adaptive behavior, should be an

integral part of a multidisciplinary approach to
mental health services. Combining technologies
derived from behavior analysis and other disci-
plines could broaden our understanding of men-
tal disorders, expand the range of available in-
terventions, and improve therapeutic outcomes
and client satisfaction.
This article briefly examines early applied be-
havior analysis (ABA) research with mental dis-
orders, the development of functional behavior
assessment and functional analysis of behavior
problems, potential contributions of ABA to mul-
tidisciplinary mental health services, and recent
ABA studies with mental disorders in children and
adults. While covering these topics, the present
article highlights some of ABA’s technological
developments within mental health services and
special challenges it has faced.
Mark T. Harvey, Florida Institute of Technology, Mel-
bourne, Florida; James K. Luiselli, The May Institute, Inc.,
Randolph, Massachusetts; Stephen E. Wong, Florida Inter-
national University, Miami, Florida.
Correspondence concerning this article should be ad-
dressed to Mark T. Harvey, School of Psychology, Florida
Institute of Technology, 150 W. University Boulevard, Mel-
bourne, FL 32901-6975. E-mail: [email protected]
Psychological Services © 2009 American Psychological
Association
2009, Vol. 6, No. 3, 212–222 1541-1559/09/$12.00 DOI:
10.1037/a0016495
212

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Evolution of Mental Health Treatment
and Behavior Analysis
The treatment of individuals with mental ill-
ness changed dramatically during the 20th cen-
tury as custodial arrangements progressed to a
mix of educative and therapeutic programs
within mental hospitals, outpatient clinics, and
community-based facilities (Braddock & Par-
ish, 2002). The use of psychosurgery and elec-
troconvulsive shock therapy decreased as phar-
macology became the treatment of choice for
many mental health impairments (Braddock &
Parish, 2002; Wong, 2006). A parallel change
has been occurring within the field of behavior
analysis as its investigations have extended
from basic research with nonhuman animals in
laboratories to improving socially significant
behavior of humans in applied settings (Baer,
Wolf, & Risley, 1968, 1987).
Much of the early research within the field of

ABA was conducted within state mental hospi-
tals using operant procedures such as token
economies, reinforcement procedures, shaping,
and extinction for persons with severe mental
disorders such as schizophrenia (Ayllon &
Azrin, 1965; Ayllon & Haughton, 1964; Ayllon
& Michael, 1959). Over the last 50 years, be-
havior analysis has been successfully applied in
mental institutions and community-based facil-
ities to increase social, self-care, vocational,
leisure, and recreational skills while concur-
rently reducing behavioral problems such as
delusional speech, bizarre behavior, and aggres-
sion (Wong, 1996; Wong, Wilder, Schock, &
Clay, 2004). Despite beneficial outcomes, be-
havior analytic techniques are often underused
or supplanted by interventions with limited sci-
entific support (Scotti, Morris, McNeil, &
Hawkins, 1996; Wong, 2006). The enhanced
prognostic and therapeutic outcomes associated
with ABA indicate that this approach could
contribute much to the treatment of clients with
mental health disorders.
A central premise of ABA is that focusing on
observable behaviors provides an objective and
empirically based framework for the assessment
and treatment of mental disorders (Scotti et al.,
1996; Wong, 1996). By concentrating on be-
havioral manifestations of mental disorders cli-
nicians can obtain specific and independently
verifiable measures of clients’ problems. This
method can also facilitate the discovery of func-
tional relations between overt behavior and en-
vironment stimuli, leading to interventions that

reengineer aspects of clients’ social and physi-
cal surroundings. Assessment of mental health
problems is complicated by reliance on self-
reports of mental states, often evaluating covert
behaviors and unobservable events. Interpreting
the roles of mental events and behavioral se-
quela are a challenging endeavor with multiple
confounding variables that must be controlled
or ruled out during the course of treatment
(MacCorquodale & Meehl, 1948). For example,
it can often be difficult to disentangle the sedat-
ing and enervating effects of medications from
the symptoms of a mental disorder, such as the
negative symptoms of schizophrenia (Wilder &
Wong, 2007). Current ABA research with men-
tal health disorders uses mixed assessment
methods, employing direct observation of overt
behaviors as well as interview, questionnaire,
and other self-report measures of covert behav-
ior and internal processes to overcome the lim-
itations of singular assessment procedures.
Functional Behavioral Assessment and
Functional Analysis
Functional analysis and functional assess-
ment arose out of research treating self-injury,
aggression, and disruptive behavior in persons
with developmental disabilities (Carr, 1977;
Iwata, Dorsey, Slifer, Bauman, & Richman,
1982). This line of research differed from prior
forms of applied behavior analysis in its inten-
sive efforts to isolate specific consequences
maintaining problem behavior (Hanley, Iwata,
& McCord, 2003). Interventions that identify
and alter consequences maintaining a “targeted”

behavior (e.g., determining that a client engages
in verbal aggression to escape work demands)
are more effective and may have better long-
term outcomes than interventions that treat the
problem by simply administering arbitrary rein-
forcers (Ingram, Lewis-Palmer, & Sugai, 2005).
Functional Behavior Assessment (FBA)
Behavior assessment entails descriptive
and/or indirect observational techniques to in-
vestigate hypotheses about the factors that pre-
dict and maintain behavior. Questionnaires,
checklists, interviews, and observational data
213APPLICATION OF APPLIED BEHAVIOR ANALYSIS
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are scrutinized to identify: motivating opera-
tions (i.e., stimuli that alter the effectiveness of
consequences and/or alter the frequency of be-
havior through their effect on consequences),
antecedents (i.e., stimuli that reliably predict

when reinforcers, punishers, or neutral stimuli
will follow a behavior), behavior (i.e., an oper-
ational definition of an organism’s interaction
with the environment), and consequences (i.e., a
stimulus change that follows a behavior of in-
terest). Hypotheses about environmental stimuli
thought to educe and maintain problem behav-
ior are incorporated in the client’s treatment
plan, which subsequently attempts to dismantle
problematic contingencies and erect contingen-
cies that reinforce adaptive responses. Dimin-
ishing the impact of motivating operations
and/or decreasing the frequency of behavioral
cycles through antecedent manipulations often
makes the relation between targeted behavior
and antecedents ineffective or irrelevant. For
example, emotional outbursts that arise when a
client is asked to perform a certain task might be
diminished by making the task easier and less
time-consuming to perform, or by making the
task more interesting and enjoyable to do.
Functional Analysis
Researchers and clinicians use functional
analysis to empirically determine which contin-
gencies maintain the problem behavior. Using a
series of brief sessions (5 to 15 min), therapists
or confederates respond in a scripted manner
(e.g., problem behavior produces either escape
from demands, staff attention, or no conse-
quences) to simulate the various contingencies
being investigated (e.g., contingent escape, con-
tingent attention, opportunity to be left alone).
These analog conditions are systematically pre-
sented to observe under which conditions the

targeted behavior most often occurs. The sys-
tematic manipulations used during functional
analysis allow investigators to determine any
functional relation between environmental stim-
uli and target behaviors (Hanley et al., 2003).
Integration of ABA Into a
Multidisciplinary Model
Behavior analytic methodology can be an
invaluable tool for multidisciplinary practice
above and beyond its ability to reveal environ-
ment-behavior relation. Operational definitions,
repeated measures, and within-subject designs
can be used to evaluate subtle effects of phar-
macological interventions on individual clients,
such as dose-response relations and drug-
behavior interactions (Poling & Ehrhardt,
1999). This methodology can also be utilized to
examine behavior that originates from medical
conditions but persists as a result of social con-
tingencies (e.g., symptoms and complaints
about an illness that continue because of atten-
tion from family members). Psychiatry may
benefit from a hypothesis driven prescriptive
model that differentiates between pharmaco-
logical agents, within a given drug class,
based on the function of targeted behaviors
(Roberts et al., 2008). Although translational
research is needed, Roberts and colleagues
(2008) demonstrated that antiepileptic drugs
showed differential effectiveness for behav-
iors maintained by either positive or negative
reinforcement (i.e., social attention vs. escape
from aversive stimulation).

Behavior is indeed the product of complex
neurochemical processes, but the behavior-
environment interaction should not be over-
looked. Scotti and colleagues (1996) described
an integrated diagnostic system using functional
analysis to augment the Diagnostic and Statis-
tical Manual of Mental Disorders (DSM) clas-
sification system, theoretically providing clini-
cians with a seamless process of classification
and support development. Additional research
is needed to identify the most efficacious means
of integrating ABA within a multidisciplinary
approach to mental disorders (Hemmings,
2007), but years of research support the amal-
gamation of ABA with other evidence-based
practices (Poling & Ehrhardt, 1999; Scotti et al.,
1996).
As demonstrated by over 50 years of scien-
tific research, behavior analytic techniques
(e.g., reinforcement, FBA, functional analysis)
offer empirically validated, evidence-based
practices for clinicians and researchers working
in mental health services. Behavior analysis has
shown utility within institutions and across
community settings, and it complements the
work of other mental health disciplines. The
following sections discuss the use of behav-
ioral treatment with children and adults who
have mental health issues and present case
214 HARVEY, LUISELLI, AND WONG
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examples to illustrate the effectiveness of
merging behavioral techniques into a multi-
disciplinary approach to mental health.
Children’s Mental Health Issues
Predominate children’s mental health issues
include attention-deficit/hyperactivity disorder
(ADHD), obsessive– compulsive disorder
(OCD), Tourette’s syndrome (TS), and other
clinical conditions categorized as anxiety and
mood disorders (American Psychiatric Associ-
ation, 2000). Although ABA has a rich tradition
with children who have developmental disabil-
ities (Matson, Laud, & Matson, 2004), there are
fewer applications among those with psychiat-
ric disorders. Explaining this difference,
Woods, Miltenberger, and Carr (2006) noted
that ABA did not evolve from clinical psychol-
ogy but instead, “out of experimental psychol-
ogy laboratories and from settings to which this
early laboratory work was first extended for
applied purposes” (p. 408). They commented
further that ABA relies on measurement of

observable behavior and not “private” (co-
vert) events that cannot be detected but con-
stitute key symptoms of many disorders. One
additional concern is that many children with
mental health issues are treated in outpatient
settings where it usually is more difficult to
establish experimental control compared to
the institutional environments that dominate
ABA research.
Documentation of “target” behaviors is a de-
fining characteristic of ABA. Therefore, it is
critical to measure the clinical problems that
children display as the result of a mental health
issue. Various data sources are used to establish
a pretreatment baseline and subsequently to ver-
ify whether treatment is effective or should be
revised in favor of alternative methods. Exam-
ples of behavior-specific frequency measures
are the number of words spoken by a child with
selective mutism (Schill, Kratochwill, & Gard-
ner, 1996), the number of tics displayed by a
child with TS (Woods & Luiselli, 2007), and the
number of hair-pulling responses by a child
with trichotillomania (Byrd, Richards, Hove, &
Friman, 2002). Also, duration data can be re-
corded, such as the amount of time a child with
a specific phobia spends in the presence of a
feared object or situation (Ricciardi, Luiselli, &
Camare, 2006). Finally, behavior analysts have
been encouraged to consider self-report of anx-
iety, beliefs, and other cognitive manifestations
as valid clinical indices and dependent measures
to evaluate treatment effectiveness (Friman,
Hayes, & Wilson, 1998).

An ABA orientation to children’s mental
health issues emphasizes FBA as a prerequisite
for treatment formulation. The purpose of con-
ducting a FBA is to identify situations that
influence clinical presentation, and in turn can
be manipulated therapeutically. For example,
stressful interactions and intrusive sensations
can exacerbate vocal and motor tics in children
with TS (Leckman, King, & Cohen, 1999). One
FBA approach would be asking the child with
TS and significant others such as parents and
teachers to list those situations most associated
with tics, as well as situations in which tics
rarely occur. Armed with such information, a
clinician can select several treatment proce-
dures that are “matched” to behavior function.
Treatment of Children’s Mental
Health Issues
Regarding treatment of children’s mental
health issues, ABA typically incorporates ante-
cedent and consequence control procedures. In-
terventions may concentrate on triggers that set
off the behavior, replacement behaviors, conse-
quences that maintain problem behavior or
adaptive behaviors, or a combination thereof.
Multimodal intervention plans decrease the
likelihood of problem behavior through ante-
cedent manipulations, teach alternative proso-
cial behaviors that may be less stigmatizing, and
provide interventionists with reactive strategies
to deescalate clients who engage in problem
behaviors.

Antecedent Manipulations
Interventions may adjust the antecedent con-
ditions so that the contextual variables that set
the occasion for a target behavior are eliminated
and the adaptive replacement behavior is more
likely to occur. As an example, a child with
OCD who has checking rituals may experience
heightened anxiety and negative thoughts that
lead to compulsive actions and resulting anxiety
relief. Eliminating these behavior provoking
“prechecking” thoughts and feelings would be a
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legitimate antecedent treatment strategy. Small
environmental manipulations such as changing
clinical environments from the austere may in-
crease follow-up visits. Identification and ame-
lioration of motivating operations may increase
compliance to treatment regimes. For example,
if a client’s sleep problem is identified and

treated, the client would be more likely to attend
counseling sessions as the reinforcing proper-
ties of avoiding group sessions are diminished.
Consequence Manipulations
Consequence variables are events and envi-
ronmental interactions that follow a clinical
problem. Often these behavior contingent con-
sequences can be positively or negatively rein-
forcing so that the effect is to strengthen (main-
tain) the problem. In the previous example of a
child with OCD, performing a checking ritual
diminishes anxiety, thereby functioning as neg-
ative reinforcement. One focus of treatment in
such a case would be eliminating this source of
reinforcement, perhaps by teaching the child to
resist performing a checking ritual and having a
parent or therapist provide positive conse-
quences as a reward for success (Wetterneck &
Woods, 2006). Behavior analysis has identified
several methods of preference assessment (e.g.,
Deleon & Iwata, 1996) which are easily be
adapted to children with mental health issues,
diminished cognitive capacity, and/or low
speech production. For example, clinicians may
use preference assessment results to reward di-
etary changes to help diminish the impact of
constipation, a common side effect of pharma-
cological agents.
Case Study: Lucy
The combination of antecedent and conse-
quence treatment procedures with data acquired
through self-report and direct measurement is

illustrated in a study by Whitton, Luiselli, and
Donaldson (2006). The participant, Lucy, was a
7-year-old girl diagnosed with generalized anx-
iety disorder (GAD) and specific phobia that
concerned fear of vomiting. Her developmental
history was significant for excessive worry,
chronic anxiety, and complaints of stomach dis-
comfort. Because she feared vomiting, Lucy
had significant eating inhibition and weight
loss.
Following an initial intake session at a hos-
pital-affiliated child clinic, several measures
were recorded during a 2-week baseline phase
and a 14-week course of treatment. Each day,
Lucy’s mother documented the frequency of
stomachache complaints and the duration of
each episode. Maternal ratings of stomachache
severity ranging from 0 (no signs of distress)
to 10 (maximum signs of distress) also were
scored based on observable behaviors such as
perceived pain, crying, and clinging. Lucy com-
pleted the Trait Anxiety subscale of the State–
Trait Anxiety Inventory for Children
(STAIC-T; Spielberger, 1973) 1 week before
initiating treatment (baseline), 1 week after ter-
minating treatment, and 5 months after treat-
ment. The Trait Anxiety subscale contains 20
self-report items that assess general anxiety-
proneness and was used as a self-report measure
to assess further Lucy’s response to treatment.
One additional measure was Lucy’s body
weight recorded by clinic nursing staff at base-
line and approximately 3-week intervals during
and following treatment.

Treatment with Lucy was implemented by a
therapist in three phases during 14 weekly to
biweekly sessions. Phase I emphasized psycho-
education about anxiety, how to recognize and
label accurately physiological signs of distress,
and how stopping anxiety early would prevent it
from building. Sessions in Phase II featured
training in behavioral coping skills through dis-
traction and relaxation. Lucy was taught to em-
ploy distraction by performing an enjoyable ac-
tivity when she was anxious or feared vomiting.
She learned how to induce relaxation through
simple breathing exercises and abbreviated
muscle “calming.” In Phase III, treatment ad-
dressed cognitive coping strategies, including
correcting misinterpretations of bodily sensa-
tions, challenging unrealistic automatic
thoughts, and employing counterthoughts to re-
place anxiety provoking self-talk. The therapist
also introduced graduated, imagined exposure
by having Lucy visualize the onset of vomiting
in a variety of social contexts and using coping
strategies to reduce her level of distress.
Another component of treatment was having
Lucy’s parents implement contingency manage-
ment procedures to help her reduce anxiety and
stomachache-related distress. They were trained in
active ignoring of Lucy’s “attention seeking” mal-
adaptive behaviors and were taught to identify
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their own reactions that might reinforce the
behaviors (e.g., talking at length with Lucy
about the discomfort or “soothing” her). The
therapist then guided them in creating an alter-
native plan for responding to Lucy’s complaints
with simple prompts to use the coping strategies
she had learned in therapy. To avoid inadvertent
reinforcement of stomachaches at bedtime by
attention from her father (who often talked with
or read to Lucy at night if she was “sick”),
periods of “father– daughter time” were sched-
uled each evening so that they were not contin-
gent on Lucy’s reports of distress.
With treatment, Lucy showed significant
clinical progress. Frequency of stomachaches
ranged from 18 to 20 each week at baseline, but
decreased steadily in response to treatment,
with only 2 incidents reported during the final
month of therapy sessions. The severity of
stomachaches also decreased contemporane-
ously with the reduction in frequency. The av-
erage maternal rating of stomachache intensity
was between 5.0 to 5.1 in the baseline phase
and 1 or less by the end of treatment. Duration

of stomachaches exceeded 500 min on average
each week at baseline, decreased progressively
during treatment, and occurred less than 10 min
each week posttreatment. Lucy’s weight at the
first week of the baseline phase was 41.2
pounds, and at her final treatment session she
weighed 43 pounds. Her mother reported that as
treatment progressed, Lucy began eating larger
portions of food at all meals and no longer
complained about “being full” or feared vomit-
ing. A nurse’s report at the clinic indicated that
the weight Lucy gained was appropriate for her
age and the length of time. Finally, on the Trait
Anxiety subscale of the STAIC-T, Lucy en-
dorsed more anxiety than 34% of females her
age before treatment, and 8% at posttreatment.
At the last treatment session, her mother indi-
cated that Lucy was less anxious in a variety of
situations. For example, she explained how
Lucy no longer expressed worry about being
left with a babysitter in contrast to her usual
increased anxiety anticipating this event.
The case report by Whitton et al. (2006) is an
example of clinical behavior analysis, an
emerging specialty within ABA that addresses
traditional mental health problems (Woods et
al., 2006). As it applies to children, clinical
behavior analysis is practiced by psychologists,
consultants, and other mental health profession-
als within office, hospital, and school settings.
ABA is at the core of clinical behavior analysis,
building on decades of research that has pro-
duced innovative assessment, treatment, and
single-case evaluation procedures. The exten-

sion of ABA to children’s mental health issues
represents a vibrant area of clinical inquiry and
one that embraces collaboration with medical,
psychiatric, and related disciplines.
Effective Strategies for Supporting Adults
Who Have Mental Health Issues
The range of behavior analytic techniques
and spectrum of mental health disorders to
which they have been applied are too broad to
be adequately covered in this article. A partial
example of this is the successful treatment of
muscle tics, nervous habits, and stuttering in
outpatients by behavior analysts using aware-
ness training and habit-reversal procedures
(Miltenberger, Fuqua, & Woods, 1998). To give
some sense of the breadth of behavior-analytic
applications in mental health services for adults,
we will briefly surmise the theoretical and ther-
apeutic model emerging from operant learning
research.
Contingency Management
Early ABA studies in mental health were
direct applications of the operant paradigm
modifying antecedent and consequent stimuli in
the hospital environment to restore patients’
functional behaviors (Ayllon & Azrin, 1965,
1968) and to reduce psychotic responses (Ayl-
lon, 1963; Ayllon & Michael, 1959). Contin-
gency management programs were typically
implemented by direct care staff who taught and
strengthened adaptive behaviors, such as self-
care and vocational skills, with verbal prompts,

modeling, positive reinforcement (e.g., praise,
tokens), and shaping through reinforcement of
successive approximations. Hospital staff si-
multaneously decreased psychotic responses,
such delusional speech and bizarre rituals, with
extinction (e.g., planned ignoring) or mild pun-
ishment (e.g., token fines, brief timeout from
reinforcement). Programs were usually evalu-
ated by monitoring the frequency of target be-
haviors and replicating treatment effects within
single-subject reversal or multiple-baseline
designs.
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The token economy is a group contingency
management program that restructures the
living environment to resemble an economic
exchange system (Ayllon & Azrin, 1965, 1968).
Desired performances in the setting are subclas-
sified and defined (e.g., self-care tasks, house-
hold duties, and social interactions), and staff

members dispense tokens to clients for perform-
ing these actions throughout the day. Tokens
operate as conditioned reinforcement, or medi-
ating stimuli, which clients can later exchange
for primary and conditioned reinforcers in the
form of snacks, grooming supplies, recreational
items, preferred activities, and other sought-after
goods. Individual contingency management pro-
grams are another therapeutic approach usually
focused on idiosyncratic problems not adequately
addressed by the group contingency program. In-
dividual programs (e.g., utilizing personalized re-
inforcers, one-to-one training, or behavioral con-
tracts) have been designed to improve a wide
spectrum of inappropriate behaviors includ-
ing physical intrusiveness, verbal and physi-
cal aggression, social isolation, and elective
mutism, to name a few (Liberman, Wallace,
Teigen, & Davis, 1974; Stahl & Leitenberg,
1976).
The effectiveness of individual contingency
management programs have been demonstrated
in scores of single-subject design studies (Wong
et al., 2004), and the superior outcomes of token
economy programs as compared to treatment-
as-usual groups have been shown in about a
dozen controlled within-subject and between-
groups design studies (Dickerson, Tenhula, &
Green-Paden, 2005). However, despite positive
outcomes associated with these programs, the
mental health systems in this country have con-
sistently favored biomedical over learning-
based interventions, relying heavily on psycho-
tropic drugs whose limited therapeutic efficacy
and serious health risks often go unrecognized

(Wong, 2006).
Functional Analysis and FBA
FBA and functional analysis have begun to
shape the design of behavioral interventions for
severe mental disorders in adults. Schock, Clay,
and Cipani (1998) presented a series of seven
case studies utilizing functional assessments
with clients diagnosed with schizophrenia who
displayed delusional speech (e.g., “I am burning
up. My uterus is on fire. I don’t have a uterus”)
or other seeming irrational acts (e.g., a client
becoming physically aggressive with other res-
idents who talked to him). Clients were ob-
served to generate hypotheses about the func-
tion of their psychotic responses. In each of
these seven cases, a probable cause of the bi-
zarre behavior was identified and removed (the
client who claimed her uterus was “on fire” was
referred to a physician who diagnosed a pelvic
infection and treated her with antibiotics; the
client who became aggressive was found to
react adversely to long conversations and was
taught to tell other residents to “leave me
alone”), which resulted in cessation of the cli-
ent’s problematic behavior.
Thus far, only a few functional analyses have
been conducted with persons with severe men-
tal disorders with normal intelligence, but re-
sults have been encouraging. Wilder, Masuda,
O’Connor, and Baham (2001) analyzed the ef-
fects of four contingencies on delusional speech
in a middle-aged man with schizophrenia: es-

cape from demand, attention, alone, and control
(brief termination of attention following bizarre
speech). These investigators found that bizarre
speech occurred at a substantially higher rate in
sessions with attention as compared to the other
experimental conditions. Based on this finding,
an intervention consisting of differential rein-
forcement of alternative (DRA) vocalizations
(attention for appropriate speech) plus extinc-
tion for bizarre vocalizations was applied and
evaluated within a reversal design. The inter-
vention was shown to nearly eliminate the cli-
ent’s psychotic speech. Results of this study
were later replicated with a second client also
diagnosed with schizophrenia who displayed
bizarre vocalizations in the form of tangential
remarks (Wilder, White, & Yu, 2003). Utilizing
simplified habit reversal procedures, the client
in this second study was also taught awareness
training and a response to compete with bizarre
vocalizations (“Oh, that didn’t make sense, we
were talking about _____”). Following a func-
tional analysis that identified attention as the
consequence maintaining the highest percent-
age of bizarre vocalizations, an intervention
comprised of awareness training, competing re-
sponse training, differential reinforcement of
appropriate speech, and extinction of bizarre
speech was implemented and shown to reduce
this psychotic behavior to near zero levels.
T
hi

ed
b
ro
ad
ly
.
Acceptance and Commitment
Therapy (ACT)
The roots of ACT can be traced back to
laboratory studies showing that verbal stimuli
can override schedules of reinforcement in the
control of human behavior (Hayes, Brownstein,
Hass, & Greenway, 1986; Hayes, Brownstein,
Zettle, Rosenfarb, & Korn, 1986) and relational
frame theory elucidating that associations be-
tween verbal stimuli largely determine the ef-
fect of those verbal stimuli (Hayes & Hayes,
1989). ACT for severe mental disorders further
assumes that prominent psychotic symptoms
are either avoidance or escape responses, or that
they engender problematic avoidance or escape
(Bach, 2004; Bach, Gaudiano, Pankey, Herbert,
& Hayes, 2006).
Schizophrenic delusions are hypothesized to
be escape-like responses that permit clients who
are troubled by feelings of failure, fear, and
demoralization to blame other people or outside
events for their difficulties. In contrast, schizo-
phrenic hallucinations are conceived as disturb-

ing internal stimuli that produce avoidance or
escape responses that interfere with the client’s
functioning (hearing ridiculing voices causes
the client to avoid other people). ACT for psy-
chotic symptoms involves: (1) identifying and
abandoning internally oriented control strate-
gies; (2) accepting the presence of difficult and
disturbing thoughts and feelings; (3) “just no-
ticing” these private experiences without resist-
ing them or accepting them as literally true; and
(4) focusing on overt behaviors with valued
outcomes.
Results of a controlled study with 80 inpa-
tient participants (Bach & Hayes, 2002) showed
that ACT produced lower symptom believabil-
ity and half the rehospitalization rate of a treat-
ment-as-usual group. Results of another con-
trolled study with 40 inpatients (Gaudiano &
Herbert, 2006) showed that ACT produced
higher symptom improvement at discharge and
lower 4-month rehospitalization rates, the latter
result not achieving statistical significance. Al-
though only preliminary evidence exists to sup-
port use of ACT with severe mental disorders,
data showing the effectiveness of ACT with a
variety of other disorders suggests its potential
utility with psychotic behavior (Hayes, Masuda,
Bisset, Luoma, & Guerrero, 2004).
ACT offers novel techniques for helping cli-
ents troubled by private events labeled as psy-
chotic symptoms. By reinterpreting their expe-
rience of delusions and hallucinations and by
refocusing on productive activity, clients can
respond to these internal stimuli in a healthy

fashion. A caveat for ACT, however, is that
therapists using this technique should be wary
of giving social reinforcement for fabricated
self-reports of hallucinations (which presents a
conundrum because, ultimately, hallucinations
are private events and are not independently
verifiable) or encouraging acceptance of cor-
rectable adversities that the client may have
expressed in veiled, metaphorical terms
(Schock et al., 1998).
Conclusions and Future Directions
Although ABA is best known for its achieve-
ments in the habilitation of persons with devel-
opmental disabilities, this approach has a long
history in the treatment of severe mental disor-
ders. Some of the first published examples of
ABA were studies that increased appropriate
behavior or reduced aberrant behavior of
chronic mental patients in psychiatric hospitals.
In recent years, ABA interventions for severe
mental disorders have grown to include refined
functional analyses of problem behavior as well
as sophisticated verbal and self-instructional
techniques (e.g., habit reversal, acceptance and
commitment therapy). Refinement of assess-
ment techniques are intended to rectify the treat-
ment failures, lack of generalization, and poor
maintenance sometimes associated with earlier
behavioral interventions.
Given the extensive history of successful
contingency management programs for severe
mental disorders and other myriad behavioral
problems, it would be prudent to provide this as

a treatment component and a foundation for
other interventions. Some advantages of contin-
gency management programs are that they
make clear, explicit expectations of appropriate
client conduct (essential for both client instruc-
tional and staff management purposes) and they
provide positive reinforcement to strengthen
and maintain desired client behavior. Consider-
ing the developments in functional analysis and
functional assessment, it also would be wise to
thoroughly investigate the function of problem
behavior before attempting to eliminate it. For
T
hi
s
do
cu
m
en
t i
s
co
py
ri
gh
te

nd
is
n
ot
to
b
e
di
ss
em
in
at
ed
b
ro
ad
ly
.
example, assessing the function of noncompli-
ance may lead to greater adherence to outpatient
medication regimens. If the client’s circum-
stances permit conducting a full functional anal-
ysis, this would be the most conclusive method
of ascertaining its meaning or the specific envi-
ronmental stimuli which predict and maintain-

ing the problem behavior. Lacking a functional
analysis, a FBA can uncover valuable informa-
tion suggesting treatment procedures that prop-
erly take into account the client’s motives.
While working with heterogeneous mental
disorders ABA has remained a vital and inno-
vative scientific approach. Although most ABA
researchers continue to focus on observable,
socially relevant responses, current applications
of ABA in mental health involve a broader
realm of clinical phenomena that has required
conceptual and methodological expansions.
ABA practitioners now attend to internal and
covert processes during assessment and inter-
vention, as in their use of self-report measures
of anxiety and imaginary exercises aimed at
changing disturbing thoughts. These radical
changes call into question some of the funda-
mental principles of ABA, and only future re-
search will determine whether these departures
represent evolutionary advances of the field.
Continued research on integrated models is war-
ranted and will further strengthen the use of
ABA within mental health while concurrently
providing more efficacious therapies.
Although integration of treatment approaches
is not completely straightforward because ther-
apies are based on different assumptions and
their procedures can be dissimilar, the use of
ACT demonstrates how behavior analysis can
merge with relational frame theory to create a
vibrant approach to mental health issues. The
case study of Lucy illustrates how functional
assessment can compliment cognitive behavior

therapy (CBT). Although challenges in combin-
ing varied ABA approaches and clinical prac-
tices within mental health are inevitable, the
approaches may complement one another rais-
ing the likelihood of producing positive and
lasting outcomes.
Research reviewed in this article demon-
strated that integration of behavior analysis
within mental health services will expand clini-
cians’ armamentarium and provide more com-
prehensive assessment and treatment. Behavior
analytic techniques, such as FBA can be used to
identify environmental stimuli that set the oc-
casion for, elicit, or reinforce problematic be-
haviors. FBA could also reveal social– environ-
mental variables underlying somatic disorders
(as in the case of Lucy described earlier) or
somatic variables underlying behavioral disor-
ders (as in the case of the woman with a pre-
sumed pelvic infection), thereby facilitating
multidisciplinary collaboration and selection
of appropriate treatments. Retaining the tech-
nology that produced early successes, ABA
provides empirically validated instructional
procedures and practical methods for engi-
neering a client’s environment to promote
adaptive behavior (e.g., parent and staff train-
ing, token programs) that no other clinical
discipline offers.
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Received March 6, 2008
Revision received March 24, 2009
Accepted April 8, 2009 �
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