UBC PSYC 217 Exam 2026 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Attrition - CORRECT ANSWER >>>Another word for mortality
- People dropping out of studies
Informed Consent - CORRECT ANSWER >>>Potential participants should be provided with all
the information that might influence their decision to participate
In what types of research is multiple regression common - CORRECT ANSWER >>>Personality,
health, and longitudinal developmental research
Regression Equation - CORRECT ANSWER >>>y = bX + a
Multiple Regression - CORRECT ANSWER >>>Uses scores on one variable (the predictor) to
predict changes in another variable (the criterion)
Squared correlation coefficient [r^2] - CORRECT ANSWER >>>The amount of shared variance
- The % of variance in one variable accounted for by the second variable
r value indicates a [Medium] effect/covariation - CORRECT ANSWER >>>0.30
r value indicates a [large] effect/covariation - CORRECT ANSWER >>>>0.40
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,r value indicates a [small] effect/variation - CORRECT ANSWER >>>0.10 - 0.20
Scatterplot - CORRECT ANSWER >>>Each pair of scores from a correlation is plotted as a single
point on a graph
Cohen's d = 1 - CORRECT ANSWER >>>The means are separated by 1 standard deviation
Cohen's d - CORRECT ANSWER >>>Describes the magnitude of the effect of the IV on the DV
% of scores fall within 3 SD - CORRECT ANSWER >>>99.7%
% of scores fall within 2 SD - CORRECT ANSWER >>>95%
% of scores fall within 1 SD - CORRECT ANSWER >>>68%
Variability - CORRECT ANSWER >>>The spread in a distribution of scores
Mean as most useful measure of central tendency - CORRECT ANSWER >>>It maximises the
use of all data
- Can use in statistical analysis
Value of central tendency to use when you have [nominal or ordinal variables] - CORRECT
ANSWER >>>Mode
Value of central tendency to use when [outliers] - CORRECT ANSWER >>>Median
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, Structural equation modelling - CORRECT ANSWER >>>SEM examines models that specify a set
of relationships among many variables
Yes/No is IV x PV true experimental design - CORRECT ANSWER >>>No
- Participant variables are not randomly assigned or controlled
Statistical analysis to assess the unique contribution of each variable in a correlation -
CORRECT ANSWER >>>Multiple Regression
Discriminant validity - CORRECT ANSWER >>>Is the measure not related to what it shouldn't
relate to?
- The measure should be able to discriminate between the construct being measured and other
unrelated constructs
Internal consistency reliability - CORRECT ANSWER >>>Assesses how well a certain set of items
relate to one another
- Is a participants score on this construct similar across items that are aimed to measure related
aspects of the construct
Quality that single case experiments lack - CORRECT ANSWER >>>Generalizability
Setting that true experiments generally harder to perform - CORRECT ANSWER >>>In applied
settings
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DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Attrition - CORRECT ANSWER >>>Another word for mortality
- People dropping out of studies
Informed Consent - CORRECT ANSWER >>>Potential participants should be provided with all
the information that might influence their decision to participate
In what types of research is multiple regression common - CORRECT ANSWER >>>Personality,
health, and longitudinal developmental research
Regression Equation - CORRECT ANSWER >>>y = bX + a
Multiple Regression - CORRECT ANSWER >>>Uses scores on one variable (the predictor) to
predict changes in another variable (the criterion)
Squared correlation coefficient [r^2] - CORRECT ANSWER >>>The amount of shared variance
- The % of variance in one variable accounted for by the second variable
r value indicates a [Medium] effect/covariation - CORRECT ANSWER >>>0.30
r value indicates a [large] effect/covariation - CORRECT ANSWER >>>>0.40
1|Page
,r value indicates a [small] effect/variation - CORRECT ANSWER >>>0.10 - 0.20
Scatterplot - CORRECT ANSWER >>>Each pair of scores from a correlation is plotted as a single
point on a graph
Cohen's d = 1 - CORRECT ANSWER >>>The means are separated by 1 standard deviation
Cohen's d - CORRECT ANSWER >>>Describes the magnitude of the effect of the IV on the DV
% of scores fall within 3 SD - CORRECT ANSWER >>>99.7%
% of scores fall within 2 SD - CORRECT ANSWER >>>95%
% of scores fall within 1 SD - CORRECT ANSWER >>>68%
Variability - CORRECT ANSWER >>>The spread in a distribution of scores
Mean as most useful measure of central tendency - CORRECT ANSWER >>>It maximises the
use of all data
- Can use in statistical analysis
Value of central tendency to use when you have [nominal or ordinal variables] - CORRECT
ANSWER >>>Mode
Value of central tendency to use when [outliers] - CORRECT ANSWER >>>Median
2|Page
, Structural equation modelling - CORRECT ANSWER >>>SEM examines models that specify a set
of relationships among many variables
Yes/No is IV x PV true experimental design - CORRECT ANSWER >>>No
- Participant variables are not randomly assigned or controlled
Statistical analysis to assess the unique contribution of each variable in a correlation -
CORRECT ANSWER >>>Multiple Regression
Discriminant validity - CORRECT ANSWER >>>Is the measure not related to what it shouldn't
relate to?
- The measure should be able to discriminate between the construct being measured and other
unrelated constructs
Internal consistency reliability - CORRECT ANSWER >>>Assesses how well a certain set of items
relate to one another
- Is a participants score on this construct similar across items that are aimed to measure related
aspects of the construct
Quality that single case experiments lack - CORRECT ANSWER >>>Generalizability
Setting that true experiments generally harder to perform - CORRECT ANSWER >>>In applied
settings
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