Researchers sometimes recruit participants with specific characteristics as a function of theoretical demands. For example, researchers interested in the question of the effects of nature versus nurture conduct twin studies.
Which of the following participant characteristics is least likely to be informed by psychological theory?

Question

Quizplus · Accepted Answer

Blood type is least likely to be informed by psychological theory, as it is a biological characteristic that is not typically studied in relation to behavior or psychological processes. Age, personality, and gender, on the other hand, are all variables that are often studied in relation to various psychological theories and concepts.

Researchers Sometimes Recruit Participants with Specific Characteristics as a Function