Which of the Following Is a Valid Statement Relating to Research

question 54

Multiple Choice

Which of the following is a valid statement relating to research concerning genetic influence on cognitive abilities?

• A) Fraternal twins have higher correlations on scores of cognitive functioning than do monozygotic twins.
• B) About 60 percent of the individual differences in cognitive abilities in older adults are environmental in nature.
• C) For general cognitive ability, heritability decreases with age.
• D) Meta-analyses of variance in IQ scores among twins suggest that 50 percent of the variance can be explained by genetic differences.

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Definitions:

Peak Potential

This term suggests reaching the highest level of capability or performance that an individual is capable of achieving in a particular domain.

Physical Development

The biological process of growth and change that occurs in a person’s body over time, including both gross and fine motor skills.

Age 25-40

Refers to the age range typically associated with early adulthood to mid-adulthood, often marked by significant life milestones such as career development, starting a family, and establishing financial independence.

Reflective Judgment

The capacity to critically evaluate the validity and reliability of different sources of information and perspectives.