The document discusses the psychological basis of contrastive analysis through several key points:
1) Contrastive analysis is founded on the assumption that second language learners will transfer features of their first language to their second language. This transfer is explained by psychological theories of associationism and stimulus-response learning.
2) Experimental studies of language transfer often use simplified tasks like nonsense syllables rather than examining real-world language learning, but the findings still provide evidence for transfer effects.
3) Contrastive analysis examines "proaction," the effect of prior first language learning on second language acquisition, informed by behaviorist learning theory which views language as a habit structure.