Key words

Hindsight Bias:  The tendency to believe, after learning an outcome that one would                          have foreseen it.  Also know as the I-knew-it-all-along phenomenon.

Operational Definitions:  A statement of the procedures used to define research                                           variables.  For example, human intelligence may be                                                operationally defined as what an intelligence test measures.

Random Sample:  A sample that fairly represents a population because each                                       member has an equal chance of inclusion.

Critical Thinking:  Thinking that does not blindly accept arguments and conclusions.                              Rather, it examines assumptions, discerns hidden values,                                        evaluates evidence, and assesses conclusions.