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PSYCHOLOGICAL SCALING

PSYCHOLOGICAL SCALING. Lecture 2. SCALING CONCEPTS. SCALING CONCEPTS- Stimulus Scaling. STIMULUS SCALING: Quantitative characteristics: size, #, etc. Qualitative characteristics: psych. such as preference, perception. SCALING CONCEPTS- Stimulus Scaling.

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PSYCHOLOGICAL SCALING

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  1. PSYCHOLOGICAL SCALING Lecture 2

  2. SCALING CONCEPTS

  3. SCALING CONCEPTS- Stimulus Scaling • STIMULUS SCALING: Quantitative characteristics: size, #, etc. Qualitative characteristics: psych. such as preference, perception

  4. SCALING CONCEPTS- Stimulus Scaling • STIMULUS SCALING: example: scaling word phonology and morphology (Willson, V. L., & Rupley, W. H. (1993). Structural components of single word decoding: Activation of orthographic, meaning, and phonological processors. Reading Research and Instruction, 32, 33-45.) • WORD #GRAPH CONS CONS SILENT R-CON VOW #SYLL • EMES BLND DIGR MARK VOW DIG • carfull 6 0 0 0 1 0 2

  5. Task: scale the stimuli in this chart (small groups of 3-4)

  6. SCALING CONCEPTS- Person Scaling • PERSON SCALING Quantitative characteristics: physical representational/attributes Qualitative characteristics: psychological: cognitive, affective, behavioral

  7. SCALING CONCEPTS- Response Scaling Quantitative: level of measurement Qualitative: categorization association (trees, links,

  8. Response Scaling- Quantitative Quantitative: level of measurement: • NOMINAL • ORDINAL • INTERVAL • RATIO

  9. SCALING CONCEPTS- Response Scaling • example: Willson (1994): the effect of reading a consonant digraph on a student’s ability to decode a word

  10. Distribution of individual student regression weights for consonant digraphs 2 11 1 777 0 12234 -0 2345555557777777778889999 -1 0000111222355566666799 -2 0000113355688 -3 02346 -4 2229 n= 78 Note: e-02

  11. Response Scaling- Qualitative • Qualitative: categorization association (trees, links, etc.) • example: sorting concepts

  12. Activity: 1. sort the countries listed on the handouts into at least 3 piles, no single country by itself (small groups) 2. Categorize each pile by some label 3. Write your labels on the board with the countries below them

  13. SCALING PROCEDURES • FACTOR ANALYSIS (interval scaling) • LATENT PARTITION ANALYSIS (categorical scaling) • Q-SORT (categorical scaling, restricted categories) • MULTIDIMENSIONAL metric (Mahalanobis) nonmetric

  14. SCALING PROCEDURES • Jnd: just noticeable difference (physiological) • Guttman (logical/psychological)- complete ordering • Thurstone/Likert (psychological)- jnd applied to affective beliefs • Semantic differential (polar- psychological) • Item response theory (IRT)- mathematical

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