What is a disadvantage of between participants design?Select one:a.It's difficult to work out the purpose of the experiment.b.There may be order effectsc.Individual differences may have an effectd.Additional stimuli needed.

A major disadvantage of between-subjects designs is thatQuestion 7Answera.the effect of one treatment may alter the effectiveness of later treatments.b.one can use only a single independent variable.c.participant differences may obscure treatment effects.d.one must employ fewer independent variables.

Which of these is a disadvantage experiments have compared to other methods?Question 9Answera.They can ignore ethical issues more easilyb.They give a less clear picture of causalityc.Their results are not easily confirmed by applied studiesd.They are less able to consider more than one influence at once

Which of these is an advantage of the experiment, rather than something experiments are limited in doing?Question 4Answera.Have high external validityb.Easy to study many factors at the same timec.Can manipulate any variable you choosed.Can isolate causes free of any confounding variables

Which of the following is a threat to internal validity found in within-groups designs but not in independent (between)-groups designs? Group of answer choicesdemand characteristicsdesign confoundpractice effectsselection effects

Which of the following is an extremely important design element to have in an experimental study? Check all that apply. Treatments that are imposed by the experimenter A placebo Groups which are exactly the same size Randomized selection of participants