UBC PSYC 217 Final Exam Questions and Answers Fully Solved
Attrition - Answers Another word for mortality
- People dropping out of studies
Informed Consent - Answers 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 - Answers Personality, health, and longitudinal
developmental research
Regression Equation - Answers y = bX + a
Multiple Regression - Answers Uses scores on one variable (the predictor) to predict changes in another
variable (the criterion)
Squared correlation coefficient [r^2] - Answers The amount of shared variance
- The % of variance in one variable accounted for by the second variable
r value indicates a [Medium] effect/covariation - Answers 0.30
r value indicates a [large] effect/covariation - Answers >0.40
r value indicates a [small] effect/variation - Answers 0.10 - 0.20
Scatterplot - Answers Each pair of scores from a correlation is plotted as a single point on a graph
Cohen's d = 1 - Answers The means are separated by 1 standard deviation
Cohen's d - Answers Describes the magnitude of the effect of the IV on the DV
% of scores fall within 3 SD - Answers 99.7%
% of scores fall within 2 SD - Answers 95%
% of scores fall within 1 SD - Answers 68%
Variability - Answers The spread in a distribution of scores
Mean as most useful measure of central tendency - Answers 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] - Answers Mode
Value of central tendency to use when [outliers] - Answers Median
, Structural equation modelling - Answers SEM examines models that specify a set of relationships among
many variables
Yes/No is IV x PV true experimental design - Answers No
- Participant variables are not randomly assigned or controlled
Statistical analysis to assess the unique contribution of each variable in a correlation - Answers Multiple
Regression
Discriminant validity - Answers 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 - Answers 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 - Answers Generalizability
Setting that true experiments generally harder to perform - Answers In applied settings
Reactive measure show - Answers What the person is like when he/she is aware of being observed
Type(s) if scale(s) allow you to make quantitative distinctions? - Answers Internal and ratio
What an animal care committed is composed of - Answers 1 scientist with experience in animal use
1 institutional member who does not use animals
1 experienced vet and a community member
Multiple baseline: Across situations - Answers Same behaviour is measured in different settings
Multiple baseline: Across Behaviours - Answers Several different behaviours of a participant are
measured over time
Multiple baseline: Across participants - Answers The behaviour of several participants is measured over
time
Ethical problem associated with reversal designs - Answers You cannot ethically take people (medical
patients) off treatment that is working
Attrition - Answers Another word for mortality
- People dropping out of studies
Informed Consent - Answers 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 - Answers Personality, health, and longitudinal
developmental research
Regression Equation - Answers y = bX + a
Multiple Regression - Answers Uses scores on one variable (the predictor) to predict changes in another
variable (the criterion)
Squared correlation coefficient [r^2] - Answers The amount of shared variance
- The % of variance in one variable accounted for by the second variable
r value indicates a [Medium] effect/covariation - Answers 0.30
r value indicates a [large] effect/covariation - Answers >0.40
r value indicates a [small] effect/variation - Answers 0.10 - 0.20
Scatterplot - Answers Each pair of scores from a correlation is plotted as a single point on a graph
Cohen's d = 1 - Answers The means are separated by 1 standard deviation
Cohen's d - Answers Describes the magnitude of the effect of the IV on the DV
% of scores fall within 3 SD - Answers 99.7%
% of scores fall within 2 SD - Answers 95%
% of scores fall within 1 SD - Answers 68%
Variability - Answers The spread in a distribution of scores
Mean as most useful measure of central tendency - Answers 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] - Answers Mode
Value of central tendency to use when [outliers] - Answers Median
, Structural equation modelling - Answers SEM examines models that specify a set of relationships among
many variables
Yes/No is IV x PV true experimental design - Answers No
- Participant variables are not randomly assigned or controlled
Statistical analysis to assess the unique contribution of each variable in a correlation - Answers Multiple
Regression
Discriminant validity - Answers 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 - Answers 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 - Answers Generalizability
Setting that true experiments generally harder to perform - Answers In applied settings
Reactive measure show - Answers What the person is like when he/she is aware of being observed
Type(s) if scale(s) allow you to make quantitative distinctions? - Answers Internal and ratio
What an animal care committed is composed of - Answers 1 scientist with experience in animal use
1 institutional member who does not use animals
1 experienced vet and a community member
Multiple baseline: Across situations - Answers Same behaviour is measured in different settings
Multiple baseline: Across Behaviours - Answers Several different behaviours of a participant are
measured over time
Multiple baseline: Across participants - Answers The behaviour of several participants is measured over
time
Ethical problem associated with reversal designs - Answers You cannot ethically take people (medical
patients) off treatment that is working
