Library for scoring questionnaires
Project description
Scorify: A simple tool for scoring psychological self-report questionnaires.
Background
Many psychology studies use one or more self-report questionnaires to understand their participants. These responses go into CSV files with one question per column, one participant per row.
Scoring these files is a bunch of work. Oftentimes, many questionnaires (or sub-scales) are included in one CSV file. Often, half of the questions are "reverse-scored" to combat the tendancy people have to agree with questions. Scoring these files usually means spending a whole bunch of time in Excel, and no one likes doing that.
Scorify aims to fix this.
Installation
scorify requires Python 3.5.
pip install scorify
should have you set up.
Examples
See examples/ for some test files. To run the neurohack data and scoresheet, do something like:
score_data neurohack_scoresheet.csv neurohack_April+2,+2019_11.05.csv
Getting started
Given an example CSV file, let's say you want to score 5 columns, the answers can be 1 to 5, where the third and fifth are reversed.
| ppt | happy1 | happy2 | happy3 | happy4 | happy5 | | 3001 | 1 | 2 | 1 | 3 | 4 | | 3002 | 4 | 1 | 5 | 1 | 2 | | 3003 | 1 | 3 | 2 | 3 | 1 | | ... |
Create a scoresheet that looks like:
A | B | C | D |
---|---|---|---|
layout | header | ||
layout | data | ||
transform | normal | map(1:5,1:5) | |
transform | reverse | map(1:5,5:1) | |
score | ppt | ||
score | happy1 | happy | normal |
score | happy2 | happy | normal |
score | happy3 | happy | reverse |
score | happy4 | happy | normal |
score | happy5 | happy | reverse |
measure | happy | mean(happy) |
Then you call score_data
with that scoresheet and datafile, like:
score_data scoresheet.csv datafile.csv
Your output just goes to STDOUT, and you should see it renaming columns. To save the output if it looks good, just pipe it to a file:
score_data scoresheet.csv datafile.csv > output.csv
Other common operations
Excluding participants
If some participant data is particularly messy, you can exclude it using your scoresheet like this:
A | B | C |
---|---|---|
exclude | ppt_id_column_name | 3001 |
Keeping second row headers
If your question headers have a second row with verbose question text in them,
you can keep that in the scored data by adding a layout keep
instruction:
layout header
layout keep
layout data
Repeat the layout keep instruction if you want to keep more than one row.
Scoresheet reference
The main input to scorify is a comma or tab-delimited "scoresheet" that has many rows and four columns. The first column tells what kind of command the row will be, and will be one of: layout
, exclude
, transform
, score
, or measure
.
layout
The layout section tells scorify what your input data looks like. It must contain a header
and data
, but skip
and keep
are also valid. data
tells scorify that the rest of your input file is data. So:
layout header
layout skip
layout data
would tell scorify to expect a header row, skip a line, and then read the rest of the file as data.
layout header
layout keep
layout data
would result in scorify expecting a header row, keeping the next line as-is, and reading the rest of the file as data.
rename
The rename section renames a header column, and looks like:
rename original_name new_name
Columns can only be renamed once, and must use a new, unique name. You must use the column's new name everywhere in the scoresheet.
exclude
The format of an exclude line is:
exclude column value
which will, as you might expect, exclude rows where column
== value
.
transform
Sometimes, you'll want to reverse-score a column or otherwise change its value for scoring. And you'll want to give that some kind of sane name. Transforms let you do this. They look like:
transform name mapper
Right now, you can apply two transformations.
map()
A linear mapping. Example:
transform reverse map(1:5,5:1)
which will map the values 1,2,3,4,5 to 5,4,3,2,1. This will happily map values outside its input domain.
discrete_map()
A mapping for discrete values. Useful to map a numbers to human-meaningful values.
transform score_gender discrete_map("1":"f", "2":"m")
Unmapped values will return a blank.
This transform can be useful when combined with join()
(below) to combine an array of checkboxes into one column.
passthrough_map()
Like discrete_map()
, though unmapped values will be unchanged. So, if you have:
transform score_gender passthrough_map("1":"f", "2":"m")
a value of "999" will still be "999".
score
The score section is where you tell scorify which columns you want in your output, what measure (if any) they belong to, and what transform (again, if any) you want to apply. These look like
score column measure_name transform
measure_name
and transform
are both optional. So, to reverse score (using the reverse
we defined up above) a column called happy_1
and add it to the happy
measure, use:
score happy_1 happy reverse
You can optionally pass a 5th value, which will define the output column name:
score happy_1 happy reverse ReverseHappy1
measure
The measure section computes aggregate measures of your scored data. These lines look like:
measure final_name aggregator(measure_1, measure_2, ..., measure_n)
We support the following aggregators:
mean()
As you might expect, this calculates the mean of the measure or measures listed. Example:
measure happy mean(happy)
If any values in the measures are non-numeric, returns NaN.
mean_imputed()
Computes the mean of the measure. However, if any of the values in the measures are non-numeric, this fills in the mean of the numeric values. For example, mean_imputed(1, '', 3, 5)
is 3
.
sum()
Computes the sum fo the listed measures. Example:
measure sad sum(sad)
If any values in the measures are non-numeric, returns NaN.
sum_imputed()
Computes the sum of the measure. However, if any of the values in the measures are non-numeric, this fills in the mean of the numeric values. For example, sum_imputed(1, '', 3, 5)
is 12
.
imputed_fraction()
The fraction of the data that is non-zero and would have a value imputed for it. imputed_fraction(1, '', 3, 5)
is 0.25.
join()
join()
is a little trickier. It collects all the non-blank values in the listed measures, and joins them with the |
character. Useful if you have a set of values selected by checkbox. For example, if you had three measures that would either be blank or not for things participants might endorse, you could collate them into one column with:
measure liked_pets join(likes_cats, likes_dogs, likes_horses)
If a participant had cats
for likes_cats
and horses
for likes_horses
, you'd get:
cats|horses
ratio()
ratio(a, b)
will compute the ratio of two columns; in other words: a / b
. Notably, this works on other measures, so you can take the ratio of sums or means. In those cases, the ratio line needs to come after the other measures' lines do.
min()
min(measure_1, measure_2)
will output the minimum numeric value in the given measures. Non-numeric values will cause NaN.
max()
max(measure_1, measure_2)
will output the maximum numeric value in the given measures. Non-numeric values will cause NaN.
Complete example
If you take a scoresheet that looks like:
A | B | C | D |
---|---|---|---|
layout | header | ||
layout | data | ||
exclude | PPT_COL | bad_ppt1 | |
exclude | PPT_COL | bad_ppt2 | |
transform | normal | map(1:5,1:5) | |
transform | reverse | map(1:5,5:1) | |
score | PPT_COL | ||
score | HAPPY_Q1 | happy | normal |
score | SAD_Q1 | happy | normal |
score | HAPPY_Q2 | happy | reverse |
measure | happy_score | mean(happy) | |
measure | sad_score | mean(sad) | |
measure | happiness_ratio | ratio(happy_score, sad_score) |
and run it on data that looks like:
PPT_COL | EXTRA | HAPPY_Q1 | SAD_Q1 | HAPPY_Q2 |
---|---|---|---|---|
ppt1 | foo | 4 | 2 | 2 |
ppt2 | bar | 2 | 5 | 5 |
... you'll get output like:
PPT_COL | HAPPY_Q1: happy | SAD_Q1: sad | HAPPY_Q2: happy | happy_score | sad_score | happiness_ratio |
---|---|---|---|---|---|---|
ppt1 | 4 | 2 | 3 | 3.5 | 2 | 1.75 |
ppt2 | 2 | 5 | 1 | 1.5 | 5 | 0.3 |
Credits
Scorify uses several excellent libraries:
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