Evaluating the Experiment from the Inside: Internal Validity Andrew designed an experiment that controlled extraneous variables so that the effects on the dependent variable could only be attributed to the independent variable.Based on this description, his experiment achieved satisfactory
A)construct validity.
B)ecological validity.
C)external validity.
D)internal validity.

Question

Quizplus · Accepted Answer

Internal validity refers to the extent to which a study's design and execution can rule out alternative explanations for the observed results, thus attributing the effects on the dependent variable to the independent variable. Therefore, by controlling extraneous variables, Andrew's study achieved internal validity. Construct validity refers to the extent to which the operationalization of constructs (i.e., variables) matches the theoretical concepts being studied. Ecological validity refers to the extent to which findings can be generalized to real-life settings. External validity refers to the extent to which findings can be generalized to other populations or settings. While these are all important types of validity, based on the description provided, the experiment achieved internal validity primarily.

Evaluating the Experiment from the Inside: Internal Validity Andrew Designed