# Research:Lag between registration and first edit

This page in a nutshell: An overwhelming majority of new users (80%) make their first edit within a day of registering, and 75% make it within one hour.
Created
2011/07
Duration:  2011-07 — 2011-07
Contact: not applicable
Open data
no url provided
Open access
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Information may be incomplete and change as the project progresses.

This sprint investigates the research question: How long does it take for new users to make an edit once they register an account?

## Process

Data for a registered user's first edit ever -- which includes live and deleted edits -- was generated. This was then compared to the user's registration date. Note: because of legacy installations of MediaWiki, user registration data may be inaccurate prior to 2005. At that time, the software would sometimes record the date of a user's first edit as their registration date. However, this makes up a small percent of users given the massive growth in registration and editors in 2006-7.

The data for all users were then fitted to a Gaussian mixture model, a clustering technique that is able to separate lag observations in several classes (or components). We tried fitting a mixture of N=2,3, and 4 components. Estimation of the parameters of the model is performed via the Expectation Maximization algorithm (EM). The data are first transformed in logarithmic scale (base 10). If data are log-normally distributed, then we should see that the logarithm is distributed according to the normal distribution.

## Results

### Histogram with model fit

Mean (days) Median (days) Std. Dev. (days) Prob.
741.5 18.36 2.993e+04 0.2926
0.008591 0.004197 0.01534 0.7074

### Data

 Days between reg and first edit Number of users Percent of all users 0 3477450 80.867% 1 146917 3.417% 2 48885 1.137% 3 33918 0.789% 4 28088 0.653% 5 to 10 111996 2.604% 11 to 20 94112 2.189% 21 to 31 59312 1.379% 31 to 60 73512 1.710% 61 to 180 130443 3.033% 180 to 365 95563 2.222% Total < 1 year 4300196 100.000%
 Hours between reg and first edit Number of users Percent of all users Percent of < 1 day users 0 3257914 75.762% 93.687% 1 111753 2.599% 3.214% 2 35798 0.832% 1.029% 3 18451 0.429% 0.531% 4 11214 0.261% 0.322% 5 7382 0.172% 0.212% 6 4881 0.114% 0.140% 7 3518 0.082% 0.101% 8 2631 0.061% 0.076% 9 2451 0.057% 0.070% 10 2278 0.053% 0.066% 11 2255 0.052% 0.065% 12 2200 0.051% 0.063% 13 2068 0.048% 0.059% 14 1972 0.046% 0.057% 15 1864 0.043% 0.054% 16 1777 0.041% 0.051% 17 1561 0.036% 0.045% 18 1503 0.035% 0.043% 19 1307 0.030% 0.038% 20 1061 0.025% 0.031% 21 854 0.020% 0.025% 22 562 0.013% 0.016% 23 195 0.005% 0.006% Total < 1 day 3477450 80.867% 100.000%
 Minutes between reg and first edit number of users Percent of all users Percent of < 1 hour users 0 293625 6.828% 9.013% 1 387565 9.013% 11.896% 2 360452 8.382% 11.064% 3 290431 6.754% 8.915% 4 232709 5.412% 7.143% 5 190312 4.426% 5.842% 6 to 10 588981 13.697% 18.078% 11 to 20 484058 11.257% 14.858% 21 to 30 207025 4.814% 6.355% 31 to 40 111793 2.600% 3.431% 41 to 50 68942 1.603% 2.116% 51 to 60 42021 0.977% 1.290% Total < 1 hour 3257914 75.762% 100.000%

## Future work

Separate out this data by registration cohort: has this changed over time?