Week 6 Assessment and Testing PDF
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This document provides a general overview of assessment and testing methods, including different types of tests, measures of central tendency, variability, and standardized scores. It also touches on intelligence tests like Stanford-Binet and Wechsler scales.
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Week 6: Assessment and Testing • • • • Measurement: Quantifiable aspects Assessment: Methods for gathering information Appraisal: Extending beyond measurement to form judgments Interpretation: Expressing insights regarding the significance or utility of measurement data • • • • Measures of Centra...
Week 6: Assessment and Testing • • • • Measurement: Quantifiable aspects Assessment: Methods for gathering information Appraisal: Extending beyond measurement to form judgments Interpretation: Expressing insights regarding the significance or utility of measurement data • • • • Measures of Central Tendency Mean: Average (X or M) Median: Middle Score Mode: Most frequent score (top of curve) SKEW Additional Information • Essay test = subjective • Multiple choice = objective; specific scoring • Short answer = free choice, “free response” • Difficulty index: indicates the percentage of individuals who answered each item correctly • True and False test has dichotomous recognition items • Dichotomous = presented with two opposing choices • Normative Test: each item is independent of all other items • Ipsative Test: measures compare traits within the same individual; they do not compare a person to other persons who took the instrument. • IQ = Intelligent Quotient • Mathematical form to measure IQ → IQ= MA/CA x 100 Measures of Variability • Range: highest score minus the lowest score • Inclusive Range: high score minus low score and add 1 • Standard Deviation: value describes the variability within a distribution of scores (SD symbol) • Standard deviation is essentially the mean of all the deviations • Variance: the square of the standard deviation. Ex: SD^2 • Normal Curve: essentially distributes the scores • Standardized Scores: “Common Language” compare several different test scores for the same individual. • Occur by converting raw scores distributions • Allows comparison between individuals • Express the person’s distance from the mean in terms of the standard deviation • Z-score: Mean 0; the standard deviation is 1.0 • The Z in Z-score should remind you of zero which is the mean of this distribution • T-score: Mean of this standardized score scale is 50 and the standard deviation is 10. • Negative scores are eliminated unlike the Z-Score. Important Information • Stanford-Binet is a standardized measure scoring and administration procedures are formal and well delineated • • • • • Stanford-Binet assesses intelligence and cognitive abilities in children → age 2 and on Binet stress age-related tasks” - 50% of the 9-year-olds could answer correctly Stanford-Binet’s IQ Formula has been replaced by = SAS → Standard Age Score Stanford-Binet’s test initially created for children • Wechsler IQ Test: provides an estimate of global intellectual ability (Full scale IQ) = measure intelligence and cognitive ability in adults and older adolescents. WPPSI-III → Wechsler Preschool and Primary Scale of Intelligence for ages 2 years/6 months up to 7 years/7 months WAIS-IV → Wechsler Adult Intelligence Scale for ages 16-90 years WISC-IV → Wechsler Intelligence Scale for Children for ages 6-16 years