research psych 3

Home > Flashcards > Print Preview

The flashcards below were created by user Anonymous on FreezingBlue Flashcards. What would you like to do?

  1. (Quasi experimental) variance is necessary...
    in any research
  2. (Quasi experiental) 2 forms of variance
    -systematic between groups variance

    -nonsystematic within groups variance
  3. (Quasi experiental) Systematic between groups variance
    • -experiemnetal variance (due to IV)
    • *differences will be because of IV

    • -extraneous variance (due to confounding variable)
    • *differences will be other factors involved
  4. (Quasi experiental) Controlling variance (3)
    • -maximizing experimental variance
    • *make sure there are real differnces between groups

    • -controlling extraneuous variables
    • *groups are similar a start of experiment

    • -minimizing error variance
    • *control with careful measurement or with specific designs
  5. (Quasi experiental) < designs
    -do not include the critical controls of experimental designs

    -may still be used but caution
  6. (Quasi experiental) 4 designs of quasi exp.
    -single-group, posttest only design

    -single group, pretest and pottest design

    -pretest and posttest, natural control group design

    -ex post fact design
  7. (Quasi experiental) Ex post facto design
    -a very weak design

    -not good science

    -does not control confounding variables

    *what we do when we try to figure out, after the fact, what caused somehting to happen

    N.O people >    Hurricane      > how depressed were they? they were already depressed before the hurrican
  8. (Quasi experiental) Single group posttest only
    -no control over confounding variables

    -weak design, stronger than de facto

    *we tend to use an implciti control group (what we think would have happened if there had been no manipulation)
  9. (Quasi experiental) Single group pretest and postest design
    • -pretest documetns change but factors other than the treatment cold have accounted for the change
    • *history, maturation, regression to the mean etc.

    • ex) people may have adjusted to their stress
  10. (Quasi experiental) Pretest and postest, natural control group design
    -like an experiment except that participants aer not randomly assigned to groups

    • -it does not control selection but has a strong design
    • *selection can play a major role in certai experiments
  11. (experimental design) characterteristics of exp. design
    -more than 2 levels of the IV

    -random assingment

    -controls threat to validity
  12. (experimental design) Randomized pretest only control group designs
    -random assignment controls selection

    -other confoudning variables are controlled by comparing the treatment and no treatment group

    • *strong common design
  13. (experimental design) randomized, pretest-postest, control group design
    • -adding pretest allows us to quantify the amount of change following treatment
    • *allows us to verify groups were equal at start of experiment

    • -strong basic research design with excellent control over confounding variables
  14. (experimental design) multilevel, randomized, between subjects design
    • -may or may not include a pretest
    • *posttest is necessary

    -multigroup extension of the basic experimental design

    • -controls virtually all sources of confounding variables
    • *we can have as many groups possible
    • **most common used in drug companies
    • ***how much dosage works best
  15. (experimental design) Solomon 4 group design
    • -combines 2 basic experimental designs
    • *randomized postest only, control group
    • *randomized, pretest-postest, control group design

    -allows the assesment of an interaction between the pretest and the treatment

    *uncommon research design

  16. Research is design to...
    measure and control sources of vriance
  17. experienteal design have 2 elements
    -random assingments of participants to conditions

    -at least one control group

Card Set Information

research psych 3
2012-11-17 05:50:07
research psych

single variable indepdendetn variable groups designs
Show Answers:

What would you like to do?

Home > Flashcards > Print Preview