Observational study
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Observational techniques involve systematically observing and recording behaviors, events, or other phenomena without directly interacting with the subjects. This document discusses different types of observational techniques used in research studies, including naturalistic observation, controlled observation, standardized testing, clinical observation, surveys, interviews, microanalysis, and rating scales. It notes that observational techniques are useful in studying children because they can gather data without disturbing the subjects, but they also have limitations such as being time-consuming and not providing insight into attitudes.
Observational study
- 1. The techniques used to study and provide a statistical data is called observational techniques.
- 2. What is an Observation? The act of making and recording a measurement is called observation. Observational Research: Observational research consists of systematic observation. It draws inferences about the possible effect of a treatment on subjects where the subjects of treated group and control group is outside the control of the investigator. Observational study consist of two components: 1. Retrospective: Observation of the event that happened in past. 2. Concurrent: Observation of the event that is happening currently. In observational study we have: 1. Stimulus variable: A variable that is being observed Example: Teaching style 2. Response option: The description of the trait: Example: good, bad, excellent.
- 3. In studies of children, observational techniques are highly developed. Experiments that might alter children's lives would raise ethical problems. Observational techniques can be done without disturbance. Following are examples of different observational techniques, Naturalistic observation: (that takes place in a natural or everyday setting such as a school.) Controlled observation :(observational research, carried out under carefully arranged conditions. Each subject is exposed to the same situation, to see differences between individual reactions.) Standardized testing :( is a form of controlled observation using testing procedures previously shown to be reliable and valid.) Clinical observation:(observations made by a skilled clinician interacting with a patient or client. The clinician takes notes on the interaction, usually immediately after the interview or meeting with the client.)
- 4. Surveys and polling: In survey and polling, data are collected from large numbers of subjects. A survey can be about anything. A poll usually asks for opinions or value judgments. The goal of both is to determine the characteristics of a larger population from a relatively small sample. ◦ For example, you might conduct survey on a random sample of students from your campus to determine their attitudes towards various activites. Interviews: ◦ Interviews are structured conversations (that is, they follow some pre-arranged plan or pattern). Interviews can be combined with survey methods. ◦ For example, you might interview a random sample of preschoolers from a town where a newsworthy event took place, asking each child carefully worded questions to determine his or her perception of the event.
- 5. Microanalysis: ◦ It is a detailed analysis of very brief events. Sometimes researchers notice interesting things simply by slowing down a quick movement. This can be done with video cameras set to capture many images per second. For example: ◦ we can observe the body language more effectively if it is slow down with the help of a video camera.
- 6. Rating Scales: Rating scales is a technique in which the observer or Rater categorize or rate the objects, events, or behavior of a person by the series of continuous numerals. In Rating scales we observe the actual behavior and the remembered behavior. ◦ Behavior: The aggregate of the responses or reactions or movements made by an organism in any situation. It may be classified into two components: 1. Actual behavior: The behavior that is physically present. 2. Remembered behavior: The behavior shown in past.
- 7. There are four types of Rating Scales: 1. Nominal Scale 2. Ordinal Scale 3. Interval Scale 4. Ratio Scale Nominal Scale: ◦ It is the lowest level of measurement in which we place data into categories, without any order or structure. Characteristic: It is the most simple scale. It has no order or arrangement. Nominal scale is used to identify the objects only. In research activities a YES or NO scale is Nominal. Example: ◦ How many students are there in AWKUM? Suppose there are : 1000 students When categorized: 500 male and 500 female. (Nominal Scale)
- 8. Ordinal scale: The orderly arrangement of objects is called ordinal scale. (Label+order) The simplest ordinal scale is ranking. ◦ Characteristics: An ordinal scale only lets you interpret gross order and not the relative positional distance. This arrangement does not mean that one object is better than the other. Example: which shampoo is commonly used in Mardan? 1. Clear 2. Head & shoulder 3. Susilk ◦ In this example we don’t mean that which product is best, we just rank its usage. This is just an ordinal scale of preference.
- 9. Interval scale: ◦ In interval scale we categorize the data with its intervals. (label+order+inerval) Characteristic: The interval may be zero, because in interval scale the zero is called arbitrary zero, which means the zero also has some value. For instance; a child gets zero marks in a subject, so it doesn’t mean that he has no knowledge, he has some knowledge, but due to some reasons he could not get marks. Example: ◦ we have some data,, 2,4,6,8, this data has an interval of 2. If its 0,1,2,3,4,5,6,7,8,9 this data has also an interval of 1.
- 10. Ratio scale: ◦ The factor which clearly define Ratio scale is the True zero. (Label+order+interval+true zero) Characteristic: ◦ Ratio scale is the top level of measurement and is not often available in social research. ◦ It is mostly used in experimental research. ◦ In ratio scale the important thing is the true zero. Example: ◦ If the weight is zero .. It means true zero…Nothing ◦ If the length is zero .. It means true zero .. Nothing
- 11. Observational techniques avoid the self-selection bias that often distorts the data gathered by techniques such as surveys. Observational techniques In any group presented with a survey, the people that choose to participate often fail to represent the group adequately. This often captures both those that willingly participate in non-observation research approaches and those who do not normally participate Observational techniques can also provide a depth of information lacking in other techniques, through questions prompted by the observation itself. For example: ◦ A researcher observes a customer pick out a name-brand detergent and then opt for a less expensive brand, the researcher can ask if the decision was financial or about the intended use.
- 12. It employs technology such as cameras and recording devices, observational research represents a larger financial investment than any other research methods. A true ethnographic study requires the participation of someone with advanced anthropological training over a period lasting from days to weeks. Data analysis can be time consuming, and observational research often fails to provide insight into attitudes and motives. For example: ◦ A recording may show you how long a customer spends reading a package, but it probably can’t provide you any insight into what, if any, portion of the packaging contributed to a buying decision.
- 13. The qualitative nature of the data gathered by observational research limits how much the information generalizes. Everything from community norms to odd store design can influence the results. Observational results often prove more effective when paired with data gathered from other research methods, such as focus groups and surveys. Multiple sources of data can help to level out skewed results, and can even provide insight into the reasons. Customers choose to represent their decisions in a particular light. The End.
- 14. Please don’t hesitate to ask. Have any Question?