In the following description of a research hypothesis, identify the predictor, o

Question

In the following description of a research hypothesis, identify the predictor, outcome, and moderator variables. Also identify the possible selection effects and the possible effects of low communication.

Dr. Smith tests if the level of communication a male soldier has with his wife predicts later PTSD. His hypothesis is that low levels of communication with wives will predict higher levels of PTSD symptoms at a later time point. This test will not be able to tease out whether it is simply that the type of soldier who doesn’t communicate with his wife is also the type of soldier more likely to develop PTSD, or whether there is really an effect of low levels of communication where this, over time, exacerbates the symptoms of PTSD because the soldier isn’t getting support and help from his wife.   Dr. Smith also hypothesizes that the association between communication and PTSD will depend on whether the soldier talks to counselors or buddies. That is, perhaps low marital communication doesn’t predict later PTSD when the soldier is talking a lot to counselors or buddies.

The Predictor Variable is:

The Outcome Variable is:

The Moderator Variable is:

If Dr. Smith finds an association between marital communication and PTSD, this could be due to the following selection effect:

If Dr. Smith finds an association between marital communication and PTSD, this could be due to the following effect of low communication:

Explanation / Answer

Predictor variable : Communication with wife

Outcome variable : PTSD

Moderator variable: Talking with counselor or buddies.

Selection effect is : internal validity

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