Aim(s), Research, Directional, Non-directional and
Aims - This is the thing that the researcher is trying to discover, find out or prove.
Research Hypothesis - This is a predictive statement that the researcher expects to find, this can only be predicted after the aim has been discovered.
Directional (one-tailed) Hypothesis - This is when the hypothesis not only predicts that the IV will affect the DV, but it predicts what the effect will be meaning a specific idea of the affect the IV will have on the DV.
Non-directional Hypothesis - This means a vauge idea of the affect the IV will have on the DV.
Null Hypothesis - This predicts that there will be no differences between two conditions (IV will have no effect ont the DV.