In a Hypothetical Twin Study, Investigators Identify 50 Identical Twin

question 24

Multiple Choice

In a hypothetical twin study, investigators identify 50 identical twin pairs in which both individuals share the trait in question. In another 50 pairs, only one member exhibits the trait while the other does not. The concordance among identical twins for this trait is:

• A)5%.
• B)25%.
• C)50%.
• D)75%.
• E)100%.

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Definitions:

Executive Control System

A cognitive system responsible for the planning, initiation, sequence, and monitoring of complex goal-directed behaviors.

Prospective Memory

The feature of memory that deals with the capacity to remember to carry out intended tasks or recollect future intentions.

Phonological Loop

A component of the working memory model that is responsible for handling auditory information and the temporary storage of spoken words.

Short-Term Memory

The part of the memory system that is responsible for temporarily holding small amounts of information in consciousness.