Aptitude-treatment interaction (ATI) research is of both theoretical and practical interest to second language (L2) learning, since it provides insights into the processes linking learner-internal individual difference factors and learner-external contextual variables including instructional approach--variables that jointly determine L2 outcomes.…

The present study investigated a group of cognitive individual differences considered advantageous in second language learning and their role in language learning under implicit and explicit feedback conditions using both language awareness and language development measures. The study further investigated whether different types of awareness are…

A factor analysis of a test battery that included early first-language (L1) achievement, L1 cognitive ability, second-language (L2) aptitude, and L2 affective measures to predict oral and written L2 proficiency was conducted. The analysis yielded 4 factors that were labeled Language Analysis, composed of L1 and L2 language comprehension, grammar,…

The Linguistic Coding Deficit Hypothesis offers an alternative to affective explanations for second-language learning difficulties and adds another dimension to the role of aptitude. The hypothesis focuses on phonological, syntactic, and semantic components of language and assumes that the individual's control over these components is crucial to…

This article responds to MacIntyre's (1995) critique of the Linguistic Coding Differences Hypothesis (LCDH), which posits that language aptitude is the primary source of individual differences in foreign language (FL) achievement. It defends the LCDH and suggests that difficulties exist with theories that attribute affective and social context…

This article responds to Sparks and Ganschow's (1995) defense of their Linguistic Coding Differences Hypothesis (LCDH), arguing that the LCDH ignores the context in which language learning occurs. It asserts that LCDH is so focused on the learning of the sound system of language that it ignores affective variables. (22 references) (MDM)

Investigates numerous individual difference measures to determine their underlying dimensions, to contrast their predictive validities and to evaluate their contributions in a causal model of second language acquisition. Findings indicate that substantial links exist among affective measures and achievement. (56 references) (Author/CK)

Examines the relationships of individual difference variables to end-of-training proficiency ratings in speaking and reading for a large sample of adults in intensive training in a wide range of languages at the U.S. Department of State. Variables included tested cognitive aptitude, learning strategies, learning styles, personality, motivation and…