Why do some individuals acquire psychiatric illnesses while others do not?
We typically explain individual differences in the acquisition of pyschiatric illness by using a diathesis-stress model. An individual's neuro-physiology makes him/her more or less susceptible to illness, including addiction or depression for example. This predisposition is then triggered by an individual's environment. If an individual has a predisposition to an illness but is not placed in a stressful environment, they may not ever exhibit symptoms of the illness. In contrast, individuals who are placed in stressful environments but do not have a predisposition to the illness may not display symptoms of an illness. In this way, an individual's genetics as well as their environment contribute to the expression of an illness.
What is the function of an analysis of variance (ANOVA)?
An ANOVA compares the amount of variance between groups (within or between subjects) to that which would be predicted from a normal population. The F-statistic obtained from an ANOVA informs the amount to which each group differs from one another. In other words, it tells us the degree to which we can assume that each group came from the same population. If the groups differ from one another, we can assume that they come from different populations, or that our treatment has affected their performance in such a way as to make them unequal.
Which brain structure is implicated in allowing us to store, or consolidate, memories?