What is reverse coding in Stata?
ssc install revrs. -revrs- is a module to reverse the order of a variable’s values and maintain specified value labels. �revrs- is especially helpful for quickly recoding multiple categorical or ordinal response variables to follow a similar direction. Version 8.2 of Stata required.
How do you reverse a continuous variable?
One way to reverse a score is to subtract each participant’s score from the maximum. The maximum might be the maximum theoretically achievable in your test, or the maximum actually achieved among your participants. As a result, low scores will now be near the maximum, and high scores close to zero.
What does ## in Stata mean?
Stata: Data Analysis and Statistical Software You can put a # between two variables to create an interaction–indicators for each combination of the categories of the variables. You can put ## instead to specify a full factorial of the variables—main effects for each variable and an interaction.
How do you reverse code?
The easiest way to do this is to take the max possible score (5) and add one. Then subtract the original scores to get the reverse scored value.
How do you reverse a Likert scale?
reverse score(x) = max(x) + 1 – x In our case, max(x) is 7 because the Likert scale only went up to 7. To reverse score, we take 7 + 1 = 8, and subtract our scores from that. 8 – 7 = 1, 8 – 1 = 7. Voila.
What is a factor variable in Stata?
Factor variables are a way to quickly enter dummy variables or interactions in a regression model in stata without creating new variables first. They have an added benefit in that post- estimation commands better “understand” the components of your model.
Why do we need to reverse code?
The aim of reverse scoring is to re-code the responses so that a high score is transformed into the corresponding low score on the scale. For example, in a 5-point scale, a 4 is transformed into a 2, and vice-versa.
How do you reverse the scale factor?
Scaling can be reversed by using reciprocal factors. If we scale Figure A by a factor of 4 to obtain Figure B, we can scale B back to A using a factor of . This means that if B is a scaled copy of A, A is also a scaled copy of B; they are scaled copies of each other.
What is reverse wording?
The second strategy is using words with an opposite meaning. For example, the opposite of “I feel fit” is “I feel fatigue”. In this case the direction of the new item is changed by means of ‘reverse wording’.