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.

  1. Rule settings
  2. Rule example

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 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:

  • number of responses — The number of entered captchas (less than or equal to the number in the Recent values to use field).

  • correct responses (%) — The percentage of correct responses (from 0 to 100).

  • % incorrect answers — The percentage of incorrect responses (from 0 to 100).

To add multiple conditions, click .

then

Action to perform for the condition:

  • assign skill from the field — Save the percentage of the performer's correctly entered captchas in tasks as a skill value.

  • ban — Block access to the project or all requester's projects for the specified number of days. Only the requester can view the reason for the ban.

    If access to tasks is blocked temporarily (for example, for 7 days), the history of the performer's responses is not saved after the ban is lifted. The skill value is based on new responses.

  • assign skill value — Assign a fixed value to the skill.

  • suspend — Suspend the performer's access to the pool for the specified number of days. Only the requester can view the reason for the ban.

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 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:

  • number of responses — The number of entered captchas (less than or equal to the number in the Recent values to use field).

  • correct responses (%) — The percentage of correct responses (from 0 to 100).

  • % incorrect answers — The percentage of incorrect responses (from 0 to 100).

To add multiple conditions, click .

then

Action to perform for the condition:

  • assign skill from the field — Save the percentage of the performer's correctly entered captchas in tasks as a skill value.

  • ban — Block access to the project or all requester's projects for the specified number of days. Only the requester can view the reason for the ban.

    If access to tasks is blocked temporarily (for example, for 7 days), the history of the performer's responses is not saved after the ban is lifted. The skill value is based on new responses.

  • assign skill value — Assign a fixed value to the skill.

  • suspend — Suspend the performer's access to the pool for the specified number of days. Only the requester can view the reason for the ban.

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.