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TEST2STUDYGUIDE

TEST2STUDYGUIDE - Formulas:BMI weight(kgs height2(meters...

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Formulas: BMI: weight(kgs) / height 2 (meters) ▫weight (kg) = pounds ÷ 2.2 ▫height (m) = inches * 0.0254 % Body fat : ( 1.46 * BMI ) + ( 0.14 * Age ) – ( 11.61 * Gender ) – 10.02 male = 1, female = 0, R= 0.81, SEE= 5.7 % fat % Body fat: [ ( 0.610 * triceps + calf ) + 5.0 ] Waist to hip ratio: waist circumference / hip circumference Standard deviation =square root of sum of (scores – mean ) 2 / n-1.Remember to do it to each score and add together then divide by n-1 1 MET = Energy burned at rest•3.5 ml/kg/min of Oxygen•1 calorie/kg/hour •Most important characteristic in measurement: VALIDITY •Old defn: degree 2 which a test measures what its supposd to measure•New def: (at the test score interpretation level): degree 2 which interpretations of test scores lead 2 correct conclusions.•2nd most imp.: Reliability : degree to which a measure is consistent, unchanged over a short period of time•Another important characteristic: Objectivity: The degree to which multiple scorers agree on the magnitude of scores•Reliability explained in terms of: Observed scores True Scores Error Scores• True score = observed score + error score Sources of measurement error :•Lack of agreement among scorers•Lack of consistent performance by the individual•Failure of an instrument to measure consistently•Failure of the tester to follow standardized procedures Factors Affecting Reliability :•(Performers) : Skill, motivation, fatigue•(Test) Length, difficulty,•Testing situation Instructions, environment, management•Measurement process Instrumentation, scoring units, precision•Evaluator Competence level•Mode of statistical estimation Selecting Criterion Score :•Criterion score: measure used to indicate a person’s ability •Exercise science: often have multiple trials•Mean score vs. Best Score•Long jump scores: which best represents your ability? Best score or average score?•Many studies; lots of research•No clear answer. Types of Reliability: 1. Stability Reliability •degree2which individuals scores r unchanged from day2day•Test-retest•Factors that affect stability( Individual performance varies Measurng instrument operates/applied differently Variability among testers)2. Internal- Consistency Reliability •degree to which an individual’s scores are unchanged within a day•Not useful for maximal tests•Can b used 4 diff items/trials on same test (i.e. skill tests, psychological tests)•Usually higher than stability coeff Nt affected by day2day changes Std Error of Measurmnt :   •Reflects the degree 1may expect a test score to vary due2 measurement error • SEMeas= SD 1-r •Can use this 2construct confidence intervals Objectivity •Rater Reliability•Depends on:( Clarity of the scoring system Degree to which the judge can assign scores accurately•Determine by: Intraclass correlation (across judges) Reliability of Difference Scores : • Difference score= Final score-Initial Score•2 problems: Ceiling effects Diff scores r unreliable •Alt. r avail.

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TEST2STUDYGUIDE - Formulas:BMI weight(kgs height2(meters...

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