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. Example rule

Rule settings

Field

Description

History size

The number of recent captchas in the project included in the calculation.

If this field is empty, the calculation is based on all the captchas shown for the pool.

If
A condition for performing the action in the then field:

  • answers count — The number of recent captcha entries (less than or equal to the number in the History size field).

  • % correct answers — 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:

  • set skill from "If" — Save the performer's percentage of correct captchas as the skill value.

  • Ban — Block access to the project or all of the 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.

  • set skill — Assign a constant skill value.

  • Pause — 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

History size

The number of recent captchas in the project included in the calculation.

If this field is empty, the calculation is based on all the captchas shown for the pool.

If
A condition for performing the action in the then field:

  • answers count — The number of recent captcha entries (less than or equal to the number in the History size field).

  • % correct answers — 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:

  • set skill from "If" — Save the performer's percentage of correct captchas as the skill value.

  • Ban — Block access to the project or all of the 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.

  • set skill — Assign a constant skill value.

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

Example rule

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.