Jack Methoff randomly assigned subjects to rate the attract

• Jack Methoff randomly assigned subjects to rate the attractiveness of job candidates with either an obvious facial piercing (experimental condition) or no facial piercing (control condition). Which experimental design did he use?

o Independent groups

o Matched groups

o Multiple independent groups

o Within-subjects

Solution

a). Independent groups

In experimental design containing two independent groups, candidates are assigned randomly, they receive either of the treatment (experimental/control). Then the experimental results are compared to each other to determine the significance of variation.