Psychometrics (A+ Guaranteed) 2024.

factor analysis correct answers a statistical procedure that identifies clusters of related items (called factors) on a test; used to identify different dimensions of performance that underlie one's total score. Eigen Value correct answers Corresponds to particular factors, not between them, The variance explained by each factor, a product of factor analysis. Each factor has a possible total of 1.0, so Eigen values cannot exceed the number of factors. The Eigen value shows the relative importance of each factor by the amount of covariance of variables associated with the underlying (unobserved) common factor (which tends to be the most important factor). Factor Loading correct answers a correlation between a single measure and the factor to which it is being related, used to identify factors in factor analysis; correlation between each item and the factors (-1.00 to +1.00); items w/ high correlations are retained and commonalities among these items are examined Orthogonal Rotation correct answers Factor rotation which maintains the independence of factors. Factors are kept at right angles to one another. Maintain the independence of factors- that is, orthogonal factors are uncorrelated with one another. Oblique Rotation correct answers Factor rotation computed so that the extracted factors are correlated. identifies the extent to which each of the factors is correlated. How does one interpret a correlation coefficient correct answers Scatterplots are perhaps best illustrate how the correlation coefficient changes as the linear relationship between the two variables is altered. When r=0.0 the points scatter widely about the plot, the majority falling roughly in the shape of a circle. As the linear relationship increases, the circle becomes more and more elliptical in shape until the limiting case is reached (r=1.00 or r=-1.00) and all the points fall on a straight line. Grade equivalent scores correct answers A grade-equivalent score attempts to describe a student's score in terms of a grade level and month the student is functioning. Assumes that all students should be performing at the average for their grade level. Misconceptions of Grade Equivalent scores correct answers When a second grade student attains a grade equivalent of 5.0 on a second grade arithmetic test, it does not mean that he or she is capable of performing those arithmetic operations taught in fifth grade. It means that the student has performed as well as the average fifth grade student, on second grade work. Percentile scores correct answers Percentage of students in the norming sample who scored at or below a particular score, Indicates the percentage of people who score at or below the score one has obtained The relationship between standard deviation and varience correct answers Standard Deviation shows how much variation there is from the mean.