Defs

• Repeated measures

  1 group that does all conditions

  ☑️ no P variables

  ❌order effects (improve w practice or get worse because tired)

  SO do ABBA counterbalance
• Independent groups 


  Different Ps do diff conditions

  ☑️ no order effects

  ❎ P variables and requires more Ps
• Matched pairs

  2 groups of Ps who’ve been matched on key variables eg age

  ☑️ controls for P variables

  ❎ time consuming and can’t control all variables
• Double blind


  Ps and researchers both unaware of condition of P
• Experimental variables

  Extrenuous

  Confounding

  Situational

  Participant
• Operationalised


  Defined in a way that can easily be tested
• extraneous variable 


  Variable other than IV that effects the DV and confuses the results
• Confounding variable


  Affects findings of study directly so you’re no longer measuring what was intended
• Hawthorne effect 


  When Ps alter behaviour Bevsuse they know they’re being observed - influences results
• Control group


  Group of Ps who receive no treatment. Their behaviour acts as a baseline
• P variables


  Characteristics like age
• Order effects 


  Ps getting better w practice or tired after many trials
• Hypothesis


  Statement that researcher believes to be true
• Alternate hypothesis


  Alternative to null (initially experimental hypothesis)
• Subjectivity

  where the personal opinion of the researcher may affect the collection and interpretation of research data in psychology. (1)