Which Condition Provides the Greatest Support for a Strong Genetic

question 14

Multiple Choice

Which condition provides the greatest support for a strong genetic contribution to autism spectrum disorders (ASDs) ?

• A)Concordance among dizygotic twins is 10%.
• B)Males are affected four times more frequently than females.
• C)People with some neurologic disorders also have features of ASDs.
• D)ASDs are more likely to occur in children of parents who are over 35 at the time of conception.

---

Definitions:

Main Effect

The direct impact of an independent variable on a dependent variable in an experiment.

Factorial ANOVA

A statistical analysis method used to examine the effects of two or more categorical independent variables on one continuous dependent variable, and how their interactions affect the mean of the dependent variable.

Independent Variable

A variable in an experiment that is manipulated to observe its effect on a dependent variable.

Difference Between Levels

The quantitative or qualitative disparity observed between distinct stages or conditions in a variable.