Dr Gynther Is Interested in the Positive or Negative Quality

Multiple Choice

Dr. Gynther is interested in the positive or negative quality of parent-child interactions. He observes the number of times that the child smiles and frowns in response to parental instructions . One problem encountered by Dr. Gynther in this type of research is

A) the difficulty in counterbalancing the order of stimulus presentation.
B) ensuring that subjects are randomly assigned to groups.
C) performing a statistical analysis of the results.
D) the subjectivity that may be present in measuring the dependent variable.
E) determining how to form a control group.