Experimenal Psychology

To design an experiment is to plan just how the hypothesis is to be tested. As one of the creative activities of the scientist, the designing of a study can be even more fun than conducting it. We see evidence of this when professors design research but let their graduate assistants work to carry it out. It may appear in some investigations that there is no hypothesis at all. The investigator may be unwilling to predict what the effect is expected to be. We should note, however, that he is usually betting his time and somebody’s money that there will be an effect. It is this consideration that leads us to assert that all experiments test hypotheses.