Experiments that compare different participants in different conditions are known as designs. There are two basic forms of this design. The first is the design where participants are tested on the dependent variable only once following the manipulation. The second is the design where participants are tested on the dependent variable before and after the manipulation.

independent groups

posttest only

pretest/posttest

Explanation:

Posttest-only and pretest/posttest are the two elementary structures for experiments with independent-groups designs.

A posttest only design is most useful when spontaneous behavior is required from the participants.

Pretest-posttest designs developed from the posttest only design to consider issues of assignment bias and allocation of the participants, as they can avoid selection effects.

you probably know the answer. stop asking stupid questions and making me waste my time. j.k. ; )   b.t.w. what are three ratios equivalent to 5 : 11? thx

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.