Lecture 2: Seminar in Psych Assessment Flashcards
(26 cards)
The act of assigning numbers or symbols to
characteristics of things according to values.
Measurement
Types of Scales
Nominal Scale, Ordinal Scale, Interval Scale, Ratio Scale
involves classification or
categorization based on one or more distinguishing
characteristics, where all things measured must be
placed in mutually exclusive categories.
Nominal Scale
Classification, Ranking and NO ZERO
POINT
Ordinal Scale
Contain equal intervals
Interval Scale
Has true zero point
Ratio Scale
A set of test scores arrayed for recording or study.
Distribution
A straightforward, unmodified accounting performance that
is usually numerical.
Raw Score
All scores are listed
alongside the number of times each score occurred.
Frequency Distribution/ Simple Frequency Distribution
Class intervals replace the actual test
scores.
Grouped Frequency Distribution
Graphs used in Frequency Distribution
Histogram, Bar Graph
It is equal to the sum of observations divided by the number of
observations.
Arithmetic Mean
The middle score of the distribution
REMEMBER
If the total number of scores is an odd number, the median will be the
score that is exactly at the middle.
Median
frequently occurring (paulit-ulit) score in a distribution of scores.
Mode
Equal to the difference between the highest and lowest scores
Range
A distribution of scores can be divided into four parts such that 25 percent of the test scores occur in each quarter.
Quartile and Interquartile Range
A measure of variability equal to the measure of square root of
variance.
Standard Deviation
Relatively few scores fall at the high end of the distribution.
Test is difficult
Positive Skweness
Relatively few scores fall at the low end of the distribution.
Test is easy
Negative Skewness
Types of Kurtosis
Leptokurtic, Mesokurtic, Platykurtic
Sharp peak, heavy tails (more outliers).
Leptokurtic
Normal shape, moderate tails (typical distribution).
Mesokurtic
Flat peak, light tails (fewer outliers).
Platykurtic
The (blank) is perfectly symmetrical with no skewness.
Because it is symmetrical, the mean the median, and the mode all
have the same exact value.
Normal Curve