june8class

Internal Validity External Validity Experimental & Correlational Designs ||  ||
 * June 8 Class Session ||  || Research Designs
 * Overhead Lecture Notes || [[file:OVERHEAD.f06.pdf]] ||

=Validity=
 * control of variables that may have an affect
 * High Validity means can generalize from sample

Note Conventions - H Two Types - reference JC Lectures
 * __**Internal [causal validity] = x produces y**__
 * 8 extraneous variables that threaten internal validity
 * HIMPTRISM
 * __**External [generalization beyond the sample]**__
 * 5 types - population, ecological, temporal, treatment variation, outcome
 * PETTO
 * Statistical control
 * Construct

Other types of Classification of Validity =Types of Research Designs=
 * Content
 * Criterion Related
 * Construct

Experiments involves causes, explanation of causes

Three types of Variables
 * Independent [affected by amounts,
 * dependent
 * extraneous [confounding]

Ways to control variables
 * 1) random assignment - gold standard for controlling variables
 * 2) matching
 * 3) counterbalancing
 * 4) random sampling?
 * 5) Holding EV constant
 * 6) Statistical Control
 * 7) Incorporate into research design by making it an independement variable

=REREAD JC Chapter 9 - focus on Repeated Measures Design=