Challenge yourself with these true/false questions. Click on your choice to see if you are correct.
In correlational research, there is usually a single group of participants. (True/False)
Many theories can make almost an infinite number of predictions. (True/False)
The sex or religion of the participant is a quantitative dimension of differentiation. (True/False)
Differential research involves manipulating the independent variables. (True/False)
The Spearman r is used if one variable is measured on an ordinal scale and neither variable is measured on a nominal scale. (True/False)
A correlation coefficient of -1.00 means that there is virtually no relationship between the variables. (True/False)
Determining causation is not possible with correlational research, but can be determined in a differential study. (True/False)
Differential and correlational research findings are interpreted in a similar way. (True/False)
The strength of a relationship between two or more items is quantified in correlational research. (True/False)
In differential research, the group differences existed before the study was conducted. (True/False)
ANOVAs cannot be used at the differential level. (True/False)
The coefficient of determination is the square root of the correlation coefficient. (True/False)
Correlational research is largely an extension of experimental research. (True/False)
The relationship sought in a correlational study is a predictive relationship. (True/False)
Manipulated independent variables are used in differential research. (True/False)
In differential research, at least four groups are needed. (True/False)
The same statistical procedures can be used in differential and experimental research. (True/False)
Random sampling from a population allows us to generalize to that population. (True/False)
In differential research, the nonmanipulated independent variable is typically a discrete variable. (True/False)
Research involves the study of relationships among variables. (True/False)
Differential research is conceptually similar to correlational research. (True/False)
Confounding factors can lead to artifactual findings. (True/False)
Experimental procedures are used in situations in which manipulation of variables is impractical or impossible. (True/False)
Ptolemy predicted the movements of the planets. (True/False)
Differences between groups in differential research are manipulated by the researcher. (True/False)
A moderator variable seems to modify the relationship between other variables. (True/False)
In differential research, the independent variable is called the classification variable. (True/False)
Spearman proposed a general trait of intelligence. (True/False)
Random assignment to conditions solves most ethical problems. (True/False)
Some of the ethical problems in clinical neuropsychology can be solved with the use of correlational designs. (True/False)