Exam 9: Experimental Design Research Methods

During an experiment on police officer fitness, several members of the control group become self-conscious about their weight and begin vigorously exercising. This external threat to validity is called:

All experiments have the following features: (189-190)

Natural change among research subjects that can be a threat to the internal validity of an experiment's results is referred to as:

During an experiment involving juvenile offenders at an alternative school, four of the participants are suspended from school, thus are no longer available to the researcher. This internal threat to validity is called:

During an experiment involving young (12-14) juvenile offenders, a researcher learns that regardless of the treatment young juvenile offenders tend to 'age out' of their tendency to commit delinquent acts by the time they are 16 years old. What type of threat to the internal validity of this experiment's results is this problem?

The ability of an experimental design to document the causal relationship between an independent variable and a dependent variable is referred to as the experiment's:

The independent variable in an experimental design, or what the researcher is alleging to cause a change in the dependent variable, is also known as the:

Change in a research subject due to natural biological or psychological development (rather than the treatment) is called:

An experimental researcher is attempting to determine if a cognitive intervention technique increases social awareness among violent offenders. To mitigate the potential for pre-test bias a researcher used two different tests to measure social awareness. The researcher later learns that the two tests (one used for the pre-test and the other for the post-test) were developed to measure separate parts of this concept. What type of threat to the internal validity of this experiment's results is this p

During an experiment on recidivism among juvenile offenders a researcher learned that 35 percent of the original participants moved out of state with their families. What type of threat to the internal validity of this experiment's results is this problem?