For each of the following studies, make a chart of the four possible correct and incorrect decisions, and explain what each would mean. Each chart should be laid out like Table 6-1, but put into the boxes the possible results, using the names of the variables involved in the study.
(a) A study of whether increasing the amount of recess time improves schoolchildren's in-class behavior.
(b) A study of whether color-blind individuals can distinguish gray shades better than the population at large.
(c) A study comparing individuals who have ever been in psychotherapy to the general public to see if they are more tolerant of other people's upsets than is the general population.