Experimental Psychology week 3
Experimental Psychology week 3 PSYC 266 - 05
Popular in Experimental Psychology
Popular in Psychology (PSYC)
verified elite notetaker
This 3 page Class Notes was uploaded by emmy_rose4267 on Friday September 9, 2016. The Class Notes belongs to PSYC 266 - 05 at Truman State University taught by Ashley Ramsey in Fall 2016. Since its upload, it has received 5 views. For similar materials see Experimental Psychology in Psychology (PSYC) at Truman State University.
Reviews for Experimental Psychology week 3
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/09/16
Experimental Psychology *no class on monday, no notes 9/7 Operational Definitions Operational definition: the exact meaning of a variable by defining it Experimental operational definition: specifies exact procedure for creating values of the independent variable Measured operational definition: specifies the exact procedure for measuring the dependent variable Reliability Reliability: refers to consistency of experimental operational definitions and measured operational definitions Interrater reliability: the degree to which observers agree in their measurement of behavior ex) AP exam written section scoring by multiple people Testretest reliability: means the scores are consistent across two or more different measurements ex) bathroom scale measures the same amount 3 times each minute Interitem reliability: measures degree to which different parts of an instrument to measure the same variable achieve consistent results ex) questions in a survey asking about the same thing Validity Validity: operational definition accurately manipulates the independent variable or measures the dependent variable Face validity: which validity of a manipulation is selfevident ex) using a ruler to measure pupil size Content validity: measuring everything you intend to measure ex) Exam 1 covers all topics covered from entire semester so far Construct validity: how accurately an operational definition represents a phenomenon that is not directly measurable ex) memory (digit span test, delayed recall task, iconic memory task, auditory memory task, and a working memory task) Predictive validity: how accurately a measurement predicts future performance ex) ACT scores correlated with college GPA Concurrent validity: the degree to which scores on measuring instrument correlate with another known standard for measuring variable being studied ex) compare tests results on a measure of anxiety to the evaluations by a clinician Internal validity: degree to which when we make manipulations by IV that it is the only thing affecting the DV External validity: can you generalize your results to the population you were meant to test (good representation of the population) 9/8 Physical Variables Physical variables: are aspects of the testing situation that need to be controlled ex) day of the week, lighting in room, experimental room Controlling physical variables: 1) Eliminate extraneous variables whenever possible 2) Keep conditions constant where elimination is not possible 3) Balance the effects of extraneous variables when constancy of conditions is not possible Social Variables Social variables: are aspects of the relationships between subjects and experimenters that can influence experimental results Demand characteristics: cues within experimental situation that demand or elicit specific participant responses Singleblind experiments: participants do not know which level of IV they are getting Placebo effect: a subject receives something while they think they are receiving a different thing and react how they should to the one they are expecting to receive Cover story: false plausible explanation of the experimental procedures to disguise the research hypothesis from the subjects Experimenter bias: something the researcher is doing that could confound the experiment ex) experimenter might provide more attention to subjects in one condition than another Rosenthal effect: the phenomenon in which experimenters treat subjects differently based on their expectations and the influence on the subject’s performance Doubleblind experiment: the participant and the researcher do not know who gets what levels of the IV Personality Variables Personality of experimenters make the subjects learn more, be more motivated Employ multiple experimenters to run an equal number of subjects in each of the experimental conditions (balancing) Minimize facetoface contact and closely follow the script Videotape sessions to confirm consistent performance Volunteers: more sociable, score higher in social desirability, hold more liberal social and political attitudes, less authoritarian, and score higher on intelligence tests
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'