AP PSYCHOLOGY

Detailed explanation-1: -Disadvantages of Independent Samples Because each group contains different subjects, there can be a wide variety of subject specific factors that influence how they respond to the test. While random assignment to groups can reduce systematic differences between groups, these subject specific factors are not controlled.

Detailed explanation-2: -The main disadvantage with between subjects designs is that they can be complex and often require a large number of participants to generate any useful and analyzable data. Because each participant is only measured once, researchers need to add a new group for every treatment and manipulation.

Detailed explanation-3: -Independent Groups Design Different participants need to be recruited for each condition, which can be difficult and expensive. There is a risk of participant variables (individual differences between participants) affecting the results between conditions, rather than solely manipulation of the independent variable.