Reading and Writing

question 131

Multiple Choice

Reading and writing 

• A)developed later than spoken language, approximately 50,000 years ago. 
• B)were performed by Neanderthals as well as Homo sapiens. 
• C)developed along with spoken language, probably between 100,000 and 200,000 years ago. 
• D)developed very recently in human history, in perhaps the last 5000 to 6000 years.

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Definitions:

Factorial Designs

Experimental setups that allow researchers to examine the effects of two or more independent variables on a dependent variable simultaneously.

Single-Factor Designs

Experimental setups that involve only one independent variable to test its effect on a dependent variable.

Interaction Effects

Occurs when the effect of one independent variable on the dependent variable differs across the levels of another independent variable.

Two-Factor Research Design

An experimental layout that involves two independent variables to study their effects and interaction on a dependent variable.