Psychometrics (100% Errorless Answers)

What level of measurement would be used if participants were asked to choose their favorite picture from a set of six? a. Ordinal b. Interval c. Ratio d. Nominal correct answers D What is the difference between data measured on an interval scale and data measured on a ratio scale? a. A ratio scale has a true zero point, so zero on the scale corresponds to zero of the concept being measured. b. An interval scale has a true zero point, so zero on the scale corresponds to zero of the concept being measured. c. A ratio scale puts scores into categories, while an interval scale measures on a continuous scale. d. A ratio scale has equal intervals between the points on the scale, whereas an interval scale does not. correct answers A A likert-style (i.e., agree to disagree) rating system technically falls under the __________________ level of measurement, but most psychologists interpret it as falling under a _______________ level of measurement. correct answers Ordinal; interval Why is the scale of measurement assumption about likert-style rating systems being interval potentially problematic? correct answers WE ASSUME WE CAN CALCULATE THE DIFFERENCE BETWEEN SCORES AND THAT THE DIFFERENCE BETWEEN 7 AND 6 IS THE SAME AS 5 AND 4, BUT THAT MAY NOT BE TRUE BECAUSE IT IS ORDINAL What is the difference between covariance and correlation correct answers a. correlation is just a more standardized version of covariance b. makes it more easier to understand cause covariance is in that original unit of measurement Covariance and Correlation are two mathematical concepts which are quite commonly used in statistics. Both of these two determine the relationship and measures the dependency between two random variables. Despite, some similarities between these two mathematical terms, they are different from each other. Correlation is when the change in one item may result in the change in the another item. On the other hand, covariance is when two items vary together. Read the given article to know the differences between covariance and correlation. Briefly provide a definition of test dimensionality. Please also provide an example of multidimensional test in Psychology. correct answers IT IS GETTING AT HOW ITEMS ARE REALTATED AND HOW THEY GROUP SO ONE CAN FIGURE OUT THE PSYCHOLOGICAL MEANING OF THE TEST AND THESE GROUPINGS e.g. NEOFFI