PSY 302 Lecture Notes - Lecture 2: Inter-Rater Reliability, Twin Study, Selective Breeding
29 Mar 2016
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Document Summary
The scientific method: problem or questions, hypothesis or prediction, devising a method and gathering data, drawing conclusions. Scientific measures must be directly relevant to the hypothesis being studied, reliable and valid. Reliable: consistent info across time (test-retest reliability) and across observers (interrater reliability) Validity: measures what supposed to measure; internal (can you determine cause and effect from the independent variable) + external validity. Avantages: large amounts of info, easy & quick, standardized results. Clinical interviews - everyone asked same questions initially but you can dig deeper. Advantages: large amount of info, fast & easy, more flexible, can get a rich meaning of answers. Disadvantages: not asked standardized questions so harder to compare subjects, more likely to be biased and based on biased interpretations. Naturalistic observation - camera/person make observations while not being noticed. Advantages: better for studying infants/toddlers who don"t have language, real- life.
