Quasi-Experimental Designs/Due Sunday 5 pm

• Read the three study descriptions below: Select any two of the studies for this Assignment.
  1. Study 1 utilized a participant-variable design and demonstrated that women perform more poorly, on average, than men perform on the mathematics section of the Scholastic Aptitude Test (SAT).
  2. Study 2 utilized a comparison-group before-after design and demonstrated that students from lower socioeconomic status (SES) households benefit more over time from an academic tutoring program than do students from higher SES households.
  3. Study 3 utilized a cross-sectional design and measured the IQ of individuals who are in their twenties. In Group 1 are 20-year-olds, Group 2 are 24-year-olds, and Group 3 are 29-year-olds. The mean IQ for the three groups is 103, 100, and 90, respectively. Consider whether the researcher can accurately conclude that people lose intelligence as they age.

The Assignment (1–2 pages):

• Identify the two studies you selected for this Assignment by their corresponding numbers.
• Identify the dependent variable and independent variable in each study.
• Explain what is problematic about each of the studies you selected.
• Briefly describe at least one other type of quasi-experimental research design that might have been used for each study to gain additional or different information. Justify your rationale behind selecting that design.