![]() Two-tailed (non-directional) hypotheses – these state that a difference will be found between the conditions of the independent variable but does not state the direction of a difference or relationship. ![]() In a correlation study, the predicted direction of the correlation can be either positive or negative. One-tailed (directional) hypotheses – these state the specific direction the researcher expects the results to move in, e.g.This is also known as the experimental hypothesis. Alternative Hypotheses (Ha or H1)– these predict that there will be a significant difference in the results between the two conditions.Typically these are written ‘There will be no difference…’ Null Hypotheses (H0) – these predict that no difference will be found in the results between the conditions.Hypotheses are statements about the prediction of the results, that can be verified or disproved by some kind of investigation.
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