Control Variables
“...extends our knowledge about the association (of relationships between variables) to see if it continues or changes under different situations”
Elaboration
“...mediating and keeping the original relationship weak.”
Intervening
“based on the idea of a straight line that has the formula Y=a+bX”
Linear Regression
“If there is no order in your questionnaire you need dichotomous variables for nominal variables.”
Dummy variables
Stairway to Heaven was written by
Led Zeppelin
“in a multivariate analysis when you introduce a control variable it is referred to as a first-order _______”
Partialling
“Takes into account the relationship between X and Y when the control variable Z is introduced. It calculates the Pearson r correlation between X and Y, X and Z, and Y and Z and then recalculates the original zero-order relationship between X and Y after the effect of Z has been partially removed.”
Partial Correlation
“calculates the constant (a), the coefficient weights for each independent variable (b), and the overall multiple correlation (R).”
The Regression Line
the year our text book came out
2007
president of Canada
Justin Trudeau
“if you added a third control variable and the relationship did not hold up (the difference is statistically significant) the original claim would be __________”
Spurious and Antecedent Relationships
“...introducing a third variable…”
Two-way Analysis of Variance
"..lets the computer enter the variables, either individually or in blocks or groups of variables in the order of their correlation to the dependent variable.”
Stepwise
the first planet from the sun
Mercury
Cinco de Mayo falls on this day
5th of May
when you have “determined very specific situations in which the relationship holds true, and those in which it does not”
Specification
“..seeing if another factor affecting the outcome that is a result of the possible combined impact of the two (or more) independent variables, not just their individual effects.”
Interactive Effect
“Assuming the variables are measured using different units as the typically are, then the b weights are transformed into standardized units for comparison purposes.”
Beta Coefficients
Host of "The Price is Right"
Bob Barker
this wrestling event took place over the weekend
Wrestlemania 35
“...holding back the original zero-order relationship.”
Suppressing
“essentially looks at the combined effects of two or more independent variables on the dependent variable”
Multiple correlation
“When variables are not equally related because there is some interrelationship among the independent variables themselves”
Multicollinearity
Easter falls on this day
yes