PSYC3335: Module 1.A // Hypothesis, Variables, Reliability, Validity, and Correlation

Steps of the Scientific Method
State the research question; choose the design and methods; test the hypothesis; interpret the data; disseminate the findings.
A prediction, based on observation, previous research, and theory.
Experimental Research
Manipulates a cause to determine its effect.
Refers to producing consistent results from one time to another.
Test-Retest Reliability
Reliability that measures whether the same score is achieved on multiple attempts.
Alternate Forms Reliability
Reliability referring to whether the same results are found on different versions of the test.
Internal Consistency Reliability
Reliability of whether questions within the test correlate.
Refers to a test actually measuring the construct it is intended to measure especially upon replication.
Content Validity
Validity based in individual test items that measure what they are supposed to.
Construct Validity
Validity based in individual test items appropriately grouped into underlying categories (such as traits).
Predictive Validity
Validity based in results that are related to responses on another measurement.
External Validity
Validity of results from random sampling for broad generalization.
Measurement Techniques
Direct self-report; indirect questions/projective tests; Behavioral Measures; Physiological Methods (EKG, etc.)
Correlational Research
Examines relationships among two or more variables; no manipulation of the variables, but just recording and statistical manipulation of data.
Correlation Coefficient
Adds strength and direction to statements about relationships; ranges from -1 to 1.
No Relationship
+/- .0 to .29
Moderate Relationship
+/- .3 to .69
Strong Relationship
+/- .70+