You can quickly reverse score survey items using
widely available spreadsheets like Excel and Google Sheets or SPSS.
For example,
the freely available scale to measure Valor/ Bravery/ Courage has 10 items rated
on a 1 – 5 scale. High scores represent more of the trait. But 4 items are
worded as negative statements so, you have to reverse the item scores on the
negative items to obtain a correct total score for courage.
Sometimes
test and survey creators refer to items as + or – keyed. Positive items are
added together and the negative items must be reverse scored before adding to
the total.
Survey Items
Example
Describe
yourself as you generally are now, not as you wish to be in the future.
Describe yourself as you honestly see yourself, in relation to other people you
know of the same sex as you are, and roughly your same age. So that you can
describe yourself in an honest manner, your responses will be kept in absolute
confidence. Indicate for each statement whether it is 1. Very Inaccurate, 2.
Moderately Inaccurate, 3. Neither Accurate Nor Inaccurate, 4. Moderately
Accurate, or 5. Very Accurate as a description of you.
Here are two items from the "Courage" scale item list.
A positive or + keyed item
1. I have taken frequent stands in the face of strong opposition.
A negative or – keyed item
2. I do not stand up for my beliefs.
Scoring
Suppose a
participant rated number 1 as “4” and number 2 as “4” You would need to reverse
the score for item 2 before calculating a total.
A simple
procedure is to subtract the obtained score from the highest possible item
score plus 1. The highest possible score is 5 and 5 + 1 = 6. The reverse score
of item 2 is therefore 6 – 4 = 2. So, on a 5-point rating scale where 5 is the
high score you would reverse the scores for each negatively worded item
individually or use the formula in a spread sheet where you can use the same
reverse scoring formula for all negatively worded items.
Spreadsheets
and Reverse Scoring
Here’s an
example of a simple spread sheet for reverse scoring. The formula in column D
for positive items is simply = B3 (or whatever column and row contains the
original score) and for the negative items is simply 6 – C4 (or whatever column
and row contains the original score for the negative items).
A
|
B
|
C
|
D
|
Item #
|
Positive Scores
|
Negative Scores
|
Final Item Scores
|
1
|
3
|
3
|
|
2
|
4
|
4
|
|
3
|
2
|
2
|
|
4
|
4
|
2
|
|
5
|
2
|
4
|
|
Total
|
15.00
|
||
Mean
|
3.00
|
||
SD
|
1.00
|
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|
SPSS and
Reverse Scoring
If you are
using SPSS, you can use the Recode into Different Variables
procedure on the Transform tab at the top of your spreadsheet.
NOTE: Enter all your data first, because
SPSS does not update newly entered scores after you have performed the
procedure.
The Recode box opens to show a list of your
items such as Q1, Q2 etc.
Move the
item to be recoded into the box at the right and enter a new name such as Q1rev etc.
Click Old and New
Values
Enter the
correct values according to your scale. For example, on a 5-point scale the reverse coding is: 1 = 5, 2 =
4, 3 = 3, 4 = 2, 5 = 1
Click Continue
and OK. The new values will be listed under Q1rev etc.
Following is
a link to a YouTube video showing how to reverse score in SPSS using the recode
procedure. https://www.youtube.com/watch?v=lrI_2N3LlQM
Connections and Links to Resources
TWITTER @Geoff.W.Sutton
Publications (many free downloads)
Academia Geoff W Sutton (PhD)
ResearchGate Geoffrey W Sutton (PhD)
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