Accumulating • Accurate • Accurately • Advanced • Agree • Allowing • Concept • Consistent • Criterion • Cross • Crucial • Degree • Determining • Different • Does • Draw • Ensures • Evidence • External • Face • Helps • How • Important • Inferences • Instrument • Intended • Make • Measurement • Measures • Multiple • Obtained • Precision • Qualitative • Relevant • Reliability • Reliable • Represents • Require • Researchers • Simplest • Size • Supports • Techniques • Theoretical • Time • Two • Underlying • Valid • Validity • Yes