Each of the following examples describes situations where we can use the one-way within-subjects ANOVA. State the degrees of freedom between groups and the degrees of freedom error for each situation.
(a) A sample of 21 expert chess players rated the effectiveness of six different playing strategies.
(b) A developmental psychologist measures the amount of time 10 infants spend near their respective mother in three novel social contexts.
(c) A researcher records the cellular response to four unique environmental stimuli in a sample of nine participants exposed to each stimulus.
(d) An experimental psychologist compares scores on four measures related to addiction (impulsiveness, attention, inhibition, and discounting) in a sample of 21 people who use drugs.