Make up factorial designs?
- Ask number of IVs
- Ask about main effects
- Ask about interaction effect
Ask about number of conditions?
- Conditions = Levels
Create study designs and have student identify as B-S or W-S or Mixed Model?
Ask about number of participants per condition based on study design?
Do number of conditions change based on study design?
Is quasi-experimental only related to whether or not there is random assignment? Does
environment matter?
Nonequivalent control group design examples? X3
Nonequivalent control group design vs. Nonequivalent control group post-test only design vs.
Nonequivalent control group pretest/post-test design
Time-series designs?
- Time series
- Interrupted time series
- Control group series
Type of level of measurement for variables? Central tendency measures?
Null hypothesis testing examples?
Means and different variances/standard deviations?
SD and normal distribution?
Let’s say there is a researcher who wants to study the relationship between cell phone use &
impaired driving. The research question is “Does cell phone use impair driving?”
IV1: Someone uses cell while driving VS. Someone does not use phone while driving
Ps are assigned to either use cell while driving or not use their cell while driving, then the same
Ps are assigned to the other condition.
DV1: Driving speed
DV2: Braking time
DV3: following distance
Finding: When Ps are talking on cell, their driving is compared to when Ps are not talking on cell.
Is this true for all people? Is the relationship between cell use while driving and impaired driving
the same across all ages?
IV2: Age (Young VS. Old)
What type of factorial design is this? B-S, W-S, or mixed model
What is the study design in numbers?
Describe conditions?
How many main effects are they examining?
How many interactive effects are they examining?
What is the research question being asked? HINT: Is the relationship between ________ and
__________ different for older and younger drivers?
It depends?
Do you like hot food or cold foods? It depends
Food type: Pancake VS. Ice Cream
Temperature of food: Cold VS. Hot
DV: Liking
Crossover interaction: You like ice cream cold more than you like it hot, but you like pancakes
cold less than you like them hot.
What is the study design in numbers?
What would it look like if Temperature of Food were a W-S variable?
Do sandwiches taste better taste better when you add just bacon, just avocado, or both bacon
and avocado?
Lines are not parallel & they do not cross. Called a spreading interaction.
Describe with word “especially”.
Sandwiches taste better when you add just bacon or just avocado alone, but they taste
especially good if you add both.
Describe study design using numbers?
Describe graph?
Are there significant main effects and interactive effect?
Cell Phone, Age, & Impairment Study
N = 10 (P1, P2, P3, P4, P5, P6, P7, P8, P9, P10)
IV: Cell Phone (Cell use VS. No cell use)
IV: Age (Young VS. Old)
2X2
How many IVs?
How many levels for IV1?
How many levels for IV2?
How many main effects?
How many interactive effects?
IV1:P1, P2, P3, P4, P5, P6, P7, P8
IV2: P1, P2, P3, P4
P1, P2, P3, P4, P5, P6, P7, P8
P5, P6, P7, P8,
IV1 (W-S)
IV2(B-S)
Condition 1: Cell use & Young
Condition 2: No cell use & Young
Condition 3: Cell use & Old
Condition 4: No cell use & Old
8 (P1, P2, P3, P4, P5, P6, P7, P8) 4 (P1, P2, P3, P4)
(P1, P2, P3, P4, P5, P6, P7, P8) (P1, P2, P3, P4)
8 (P1, P2, P3, P4, P5, P6, P7, P8) 4 (P5, P6, P7, P8)
(P5, P6, P7, P8)
On p 383, which IV is B-S and which is W-S?