A frequency claim has 1 variable. An association claim has at least two variables. A casual claim has 2 variables.
Frequency claim, association claim and causal claim are the three types of claims in psychology used to study the relationships between variables.
Frequency claim involves only one variable and describes its particular rate or degree. It focusses on only one subject like depression, happiness rate, exercise rate, etc.
An association claim discusses the relationship among variables. So it involves at least two variables. It describes how one level of a variable is related with a particular level of another variable.
Causal claim always comes with two variables as it consider cause of a variable as another variable. In this one variable will be measured and the other will be manipulated.
Learn more about frequency, association and causal claims at https://brainly.com/question/14912321
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