Here are my notes on this topic:
1. Theories
- composed of constructs
- ideas, hypotheses
- not testable
2. Models
- composed of variables
- testable
- types
- independent
- dependent
- intervening
- extraneous
- confounding
3. Random Selection
- population
- sample
- sample size
- random selection
- random assignment
4. Blind & Double-blind
- Clever Hans
- Wilhelm von Osten, owner-trainer
- tap hoof
- math questions
- add, subtract, multiplication, division, fractions too
- read the questions or listen
- asked by trainer or others
- performed in public; never charged a fee
- September Commission
- no clues given
- Pfungst (1908) not satisfied with results
- Tested in two conditions
- experimenter aware of correct answer
- experimenter not aware of correct answer
- Hans only right when E knew answer
- Watched trainer; stopped when he raised chin
- Blind = Ss not know which treatment receiving
- Double-blind Ss and Es not know what treatment condition you’re in
