3. Next, reverse score the responses for: Drowsy, Fed up, Gloomy, Grouchy, Jittery, Nervous, Sad, and Tired. That is, recode, such that:
4. Now, add up the scores for the reverse scored items. That is, Drowsy, Fed up, Gloomy, Grouchy, Jittery, Nervous, Sad, and Tired.
5. Finally, add up the regular and reversescored items. That is the total on the PleasantUnpleasant scale.
Scoring the BMIS for ArousalCalm Mood
As before, it is helpful to download a copy of the BMIS in PDF or WORD format (see the first link in this section). Now, referring to the copy, to score ArousalCalm, first:
1. Convert the Meddis response scale to numbers this way:

XX = 1

X = 2

V = 3

VV = 4
2. Next, add up the responses for: Active, Caring, Fed up, Gloomy, Jittery, Lively, Loving, Nervous, Peppy, and Sad.
3. Next, reverse score the responses for: Calm, Tired. That is, recode, such that:
4. Now, add up the scores for the reverse scored items. That is, Calm and Tired.
5. Finally, add up the regular and reversescored items. That is the total on the ArousalCalm scale.
Scoring the BMIS for PositiveTired Mood
As before, it is helpful to download a copy of the BMIS in PDF or WORD format (see the first link in this section). Now, referring to the copy, to score PositiveTired, first:
1. Convert the Meddis response scale to numbers this way:

XX = 1

X = 2

V = 3

VV = 4
2. Next, add up the responses for: Active, Caring, Lively, Loving, and Peppy.
3. Next, reverse score the responses for: Drowsy and Tired. That is, recode, such that:
4. Now, add up the scores for the reverse scored items. That is, Drowsy and Tired.
5. Finally, add up the regular and reversescored items. That is the total on the PositiveTired scale
Scoring the BMIS for NegativeRelaxed Mood
As before, it is helpful to download a copy of the BMIS in PDF or WORD format (see the first link in this section). Now, referring to the copy, to score NegativeRelaxed, first:
1. Convert the Meddis response scale to numbers this way:

XX = 1

X = 2

V = 3

VV = 4
2. Next, add up the responses for: Fed up, Gloomy, Jittery, Nervous, and Sad.
3. Next, reverse score the responses for: Calm. That is, recode, such that:
4. Now, add up the scores for the reverse scored items. That is, Calm.
5. Finally, add up the regular and reversescored items. That is the total on the NegativeRelaxed scale.
A Note on Subtractive Scoring
In the original articles on the BMIS, reversescored items were never reverse scored, but instead were simply subtracted from regular items. That is, to calculate the PleasantUnpleasant dimension, for example, all the scores for the pleasant mood words were added; all the negative mood words were added, and the total score was obtained by subtracting the unpleasant total from the pleasant total.
In the scoring algorithm described above, by contrast, the reversescored items are actually reverse scored. That means that the scale averages will be different from those in earlier reports. Over the years, I have come to view reverse scoring as a superior, or, at least, more elegant procedure than simple subtraction, but subtraction works as well. To learn how to convert total scores from one scoring system to the other, see the discussion on "Comparson Between Scoring Systems" below. That includes a simple method for converting scores from one system to another.
Comparison of Scoring Methods
The following discussion is offered for converting the BMIS PleasantUnpleasant scale  scored via subtraction  to the same scale scored via reverse scoring (I now recommend reverse scoring). It also indicates how do make the reverse conversion.
Researchers may want to use these conversions to compare the mean score on the pleasantunpleasant scale of the BMIS, calculated via reverse scoring, to any of the articles which have employed the scale, but have used substractive scoring. The rationale for the conversion also is explained below. Note that the standard deviation will be the same no matter which method is employed.
How to Make the Adjustment
Note:
To convert from subtractive scoring to reversescoring, simply add 40 to each (subtractive) score.
Original Scores Calculated via Subtraction 
Add a Constant to Each Score to Convert 
The New Obtained Score Value  Equivalent to Reverse Scoring 
10 
40 
30 
5 
40 
45 
20 
40 
20 
24 (minimum possible score) 
40 
16 (minimum possible score) 
24 (maximum possible score) 
40 
64 (maximum possible score) 
19 
40 
59 
To convert from reversescoring to subtractive scoring to, simply subtract 40 from each (reversescored) score.
Obtained Scores Calculated from Reverse Scoring 
Subtract a Constant to Each Score to Convert 
The New Obtained Score Value  Equivalent to Subtractive Scoring 
61 
40 
21 
18 
40 
22 
30 
40 
10 
16 (minimum possible score) 
40 
24 
64 (maximum possible score) 
40 
24 
25 
40 
15 
Why The Adjustment Works
To see why the above adjustment works, you can compare, sidebyside, the effect of reverse scoring versus subtractive scoring, on relevant (that is, negative) items  as illustrated in the next table.
Integrating Unpleasant Mood terms in the Total Score of the BMIS: A Comparison of ReverseScore and Subtractive Methods 
Negative Mood Item

Example of a Possible Participant Response 
Scoring Using Reverse Coding 
Versus 
Scoring Using Subtractive Coding

Difference Between the Two Methods

Tired 
1 
4 
1 
5 
Sad 
2 
3 
2 
5 
Gloomy 
3 
2 
3 
5 
Drowsy 
4 
1 
4 
5 
Both reverse and subtractive coding acts to reverse the effect of a negative mood word (so that the more the person reports experiencing a negative word, the lower the resulting score will be). Subtraction adjust the score five points below reverse scoring, for each word involved. That means the adjustment will be (number of reversed mood terms) X 5. In the case of the BMIS PleasantUnpleasant scale there are eight such affected terms, for 8 X 5 = 40.
To convert the ArousalCalm scale, the comparable correction figure is 2 X 5 = 10, because there are 2 reversed adjectives involved.