Ken wants to experimentally study the relationship between strict parenting and child behavior problems, and believes that strict parenting causes more behavior problems in children.
Which of the following is the best way for Ken to define his independent variable?
He should ask parents to report how strict they are in their parenting on a scale of 1 (very lenient) to 7(very strict)
He should ask parents to report how often their children misbehave on a scale of 1 (rarely) to 7
(almost always)
He should create two groups: one group in which parents are told to be very strict, and another group in which parents are told to be very lenient.
He should create two groups: one group of children who are told to behave well, and another group of children who are told to behave poorly