Captcha
Restrict access to tasks for performers who fail to enter captcha several times in a row. This helps protect you from robots.
To show a captcha to performers, set captcha frequency in the pool settings.
The If and then fields in this rule are mandatory. If you don't fill in at least one field, you won't be able to save the rule.
Rule settings
Field | Description |
---|---|
Recent values to use | The number of times the performer was shown a captcha recently. To calculate all captcha displays in all pool tasks, fill in the field in the rule for each project pool. If this field is not filled in, only the captcha displays when completing tasks in the pool that uses this rule are counted in the calculation. |
If | A condition for performing the action in the then field:
To add multiple conditions, click |
then | Action to perform for the condition:
|
Field | Description |
---|---|
Recent values to use | The number of times the performer was shown a captcha recently. To calculate all captcha displays in all pool tasks, fill in the field in the rule for each project pool. If this field is not filled in, only the captcha displays when completing tasks in the pool that uses this rule are counted in the calculation. |
If | A condition for performing the action in the then field:
To add multiple conditions, click |
then | Action to perform for the condition:
|
Rule example
- Blocking for incorrect captcha entries
-
If the performer entered a captcha at least 5 times and the percentage of correct answers is less than 65%, they are banned and can't complete your tasks for 10 days.
The performer will be banned after the first captcha entry.
Troubleshooting
Calculate the skill for each pool separately. The current skill value is the value of the skill in the pool the user completed last. This option is convenient if:
The pools are intended for different groups of performers (for example, there are filters by city or country).
Pools are started one by one and you don't want to take into account the responses in the previous pools to calculate the skill in the current pool.
This calculation method is used by default when adding a quality control rule to a pool. For the control tasks block, leave the Recent values to use field empty.
Calculate skill based on all tasks in a project This option is good if the pools are small and you don't need to have skill calculated for each pool.
This option is available only for skills on control tasks. To use it, fill in the Recent values to use field in quality control rules in pools.
It is better to use one skill in a project. You can choose the way to calculate the skill:
Yes, of course — you can use the same skill for different projects. But most often, a skill is intended for a specific project. If the performer completes a certain task well, this doesn't mean that they will complete other ones successfully. Another disadvantage is that if you filter by skills that were set long ago, you will artificially limit the number of available performers.