Entering captchas

  1. Overview
  2. Request body

Overview

You can block access to tasks if a user incorrectly entered the captcha several times in a row. To do this, set key values in the quality_control.configs array in the pool settings.

Request body

If a performer fails 7 out of 10 captchas, you may ban them from your project's tasks for a given number of days, hours, minutes (at a time or in total), or permanently.

Ban for 10 days
{
   "captcha_frequency": "LOW",
   "configs":[
      {
         "collector_сonfig": {
            "type": "CAPTCHA",
            "parameters": {
               "history_size": 10
            }
         },
         "rules": [
            {
               "conditions": [
                  {
                     "key": "stored_results_count",
                     "operator": "EQ",
                     "value": 10
                  },
                  {
                     "key": "success_rate",
                     "operator": "LTE",
                     "value": 70.0
                  }
               ],
               "action": {
                  "type": "RESTRICTION_V2",
                  "parameters": {
                     "scope": "PROJECT",
                     "duration_unit": "DAYS",
                     "duration": 10,
                     "private_comment": "Incorrect captcha input"
                  }
               }
            }
         ]
      }
   ]
}
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To set a different ban period, change the applicable parameter for the action key:

{
   ...
               "action": {
                  "type": "RESTRICTION_V2",
                  "parameters": {
                     "scope": "PROJECT",
                     "duration_unit": "HOURS",
                     "duration": 12,
                     "private_comment": "Incorrect captcha input"
                  }
               }
   ...
}
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Parameter Overview
configs.rules.conditions

object | required

Conditions (for example, 10 task suites skipped in a row). Multiple conditions are combined with the “OR” operator.

configs[]

array of objects | required

Array of quality control settings.

configs.collector_config

object | required

Parameters for collecting statistics (for example, the number of tasks skipped in the pool).

configs.collector_config.type

string | required

Criteria for the quality control rule:

  • GOLDEN_SET — The number of correct and incorrect responses in the control tasks.

  • MAJORITY_VOTE — The percentage of responses that matched the majority vote.

  • CAPTCHA — The number of captchas entered successfully and unsuccessfully.

  • INCOME — Payment for tasks completed by the user over the past 24 hours.

  • SKIPPED_IN_ROW_ASSIGNMENTS — The number of task suites skipped in a row.

  • ANSWER_COUNT — The number of task suites completed by the user in the pool.

  • ASSIGNMENT_SUBMIT_TIME — The number of “fast” responses (the minimum response speed is set in the parameters).

  • ACCEPTANCE_RATE — The percentage of user responses that were rejected during non-automatic acceptance.

  • ASSIGNMENTS_ASSESSMENT — The number of assignments accepted or rejected with non-automatic acceptance enabled.

  • USERS_ASSESSMENT — The performer's skill value and their bans.

configs.rules.conditions.key

string | required

Values that are checked in the condition:

  • stored_results_count — The number of captcha attempts (less than or equal to history_size).

  • success_rate — The percentage of successful responses (from 0 to 100).

  • fail_rate — The percentage of unsuccessful responses (from 0 to 100).

configs.rules.conditions. value

integer | required

The threshold value of the variable specified in key.

configs.rules.conditions. operator

string | required

Comparison operator (the key data is compared with the threshold value from value):

  • EQ (“Equal”) — Equal to.

  • NE (“Not equal to”) — Not equal to.

  • GT (“Greater than”) — Greater than.

  • LT (“Less than”) — Less than.

  • GTE (“Greater than equal to”) — Greater than or equal to.

  • LTE (“Less than equal to”) — Less than or equal to.

configs.rules.action

object | required

The action to perform if conditions are met (for example, block access to the project).

configs.rules.action.type

string | required

Type of action:

  • RESTRICTION — Ban access to projects or pools.

  • SET_SKILL_FROM_OUTPUT_FIELD — Set the “percentage of correct responses” as the skill value (used in control tasks and majority vote rules).

    You can use the skill value for filtering users.

  • CHANGE_OVERLAP — Change the overlap. For example, to re-assign a task suite to other performers or cancel the recompletion of already accepted assignments.

  • REJECT_ALL_ASSIGNMENTS — Reject all performer responses. For example, after a certain number of performer responses, it became clear that the performer completed tasks poorly.

  • APPROVE_ALL_ASSIGNMENTS — Accept all performer responses. For example, if the performer completes most tasks well and you are satisfied with this result.

  • SET_SKILL — Assign the specified constant value to the skill.

configs.rules.action. parameters

object | required

Action parameters.

configs.rules.action. parameters.scope

string | required

Scope:

  • POOL — pool. Affects the user's rating.

  • PROJECT — The project. Affects the user's rating.

  • ALL_PROJECTS — All the requester's projects.

configs.collector_config. parameters

object | required if

Required if configs.collector_config.type=GOLDEN_SET, MAJORITY_VOTE, CAPTCHA, ASSIGNMENT_SUBMIT_TIME.

Parameters for collecting data (depends on the quality control rule specified in the type key).

configs.rules.action. parameters.skill_id

string | required if

Required if type=SET_SKILL_FROM_OUTPUT_FIELD.

ID of the skill to update as tasks are completed.

configs.rules.action. parameters.from_field

string | required if

Required if type=SET_SKILL_FROM_OUTPUT_FIELD.

The value to assign to the skill:

  • correct_answers_rate — The percentage of correct responses.

  • wrong_answers_rate — The percentage of incorrect responses.

configs.rules.action. parameters.skill_value

integer | required if

Required if type=SET_SKILL_FROM_OUTPUT_FIELD.

A fixed value to assign to the skill (a number from 0 to 100).

configs.rules.action. parameters.delta

integer | required if

Required if type=CHANGE_OVERLAP.

The value determines the amount to change the overlap by.
configs.rules.action. parameters.public_comment

string | required if

Required if type=REJECT_ALL_ASSIGNMENTS.

Comments (the reason for rejecting responses). Available to the requester and the performer.

captcha_frequency

string

The frequency of showing captchas:

  • LOW — Show one for every 20 tasks.

  • MEDIUM, HIGH — Show one for every 10 tasks.

By default, captchas aren't displayed.

configs.collector_config. parameters.history_size

integer

The maximum number of recently displayed captchas in the project to use for the calculation.

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

configs.rules.action. parameters.duration_unit

string

Ban duration unit:

  • MINUTES — Minutes

  • HOURS — Hours

  • DAYS — Days

  • PERMANENT — Permanent ban

configs.rules.action. parameters.duration

integer

Ban duration.

configs.rules. action.parameters. private_comment

string

Comments (the reason for blocking access). Visible only to the requester.

configs.rules.action. parameters.open_pool

boolean

Determines whether to re-open a closed pool:

  • true — Open the pool after making changes if it is closed.
  • false — Don't open the pool after making changes, if it is closed.
Parameter Overview
configs.rules.conditions

object | required

Conditions (for example, 10 task suites skipped in a row). Multiple conditions are combined with the “OR” operator.

configs[]

array of objects | required

Array of quality control settings.

configs.collector_config

object | required

Parameters for collecting statistics (for example, the number of tasks skipped in the pool).

configs.collector_config.type

string | required

Criteria for the quality control rule:

  • GOLDEN_SET — The number of correct and incorrect responses in the control tasks.

  • MAJORITY_VOTE — The percentage of responses that matched the majority vote.

  • CAPTCHA — The number of captchas entered successfully and unsuccessfully.

  • INCOME — Payment for tasks completed by the user over the past 24 hours.

  • SKIPPED_IN_ROW_ASSIGNMENTS — The number of task suites skipped in a row.

  • ANSWER_COUNT — The number of task suites completed by the user in the pool.

  • ASSIGNMENT_SUBMIT_TIME — The number of “fast” responses (the minimum response speed is set in the parameters).

  • ACCEPTANCE_RATE — The percentage of user responses that were rejected during non-automatic acceptance.

  • ASSIGNMENTS_ASSESSMENT — The number of assignments accepted or rejected with non-automatic acceptance enabled.

  • USERS_ASSESSMENT — The performer's skill value and their bans.

configs.rules.conditions.key

string | required

Values that are checked in the condition:

  • stored_results_count — The number of captcha attempts (less than or equal to history_size).

  • success_rate — The percentage of successful responses (from 0 to 100).

  • fail_rate — The percentage of unsuccessful responses (from 0 to 100).

configs.rules.conditions. value

integer | required

The threshold value of the variable specified in key.

configs.rules.conditions. operator

string | required

Comparison operator (the key data is compared with the threshold value from value):

  • EQ (“Equal”) — Equal to.

  • NE (“Not equal to”) — Not equal to.

  • GT (“Greater than”) — Greater than.

  • LT (“Less than”) — Less than.

  • GTE (“Greater than equal to”) — Greater than or equal to.

  • LTE (“Less than equal to”) — Less than or equal to.

configs.rules.action

object | required

The action to perform if conditions are met (for example, block access to the project).

configs.rules.action.type

string | required

Type of action:

  • RESTRICTION — Ban access to projects or pools.

  • SET_SKILL_FROM_OUTPUT_FIELD — Set the “percentage of correct responses” as the skill value (used in control tasks and majority vote rules).

    You can use the skill value for filtering users.

  • CHANGE_OVERLAP — Change the overlap. For example, to re-assign a task suite to other performers or cancel the recompletion of already accepted assignments.

  • REJECT_ALL_ASSIGNMENTS — Reject all performer responses. For example, after a certain number of performer responses, it became clear that the performer completed tasks poorly.

  • APPROVE_ALL_ASSIGNMENTS — Accept all performer responses. For example, if the performer completes most tasks well and you are satisfied with this result.

  • SET_SKILL — Assign the specified constant value to the skill.

configs.rules.action. parameters

object | required

Action parameters.

configs.rules.action. parameters.scope

string | required

Scope:

  • POOL — pool. Affects the user's rating.

  • PROJECT — The project. Affects the user's rating.

  • ALL_PROJECTS — All the requester's projects.

configs.collector_config. parameters

object | required if

Required if configs.collector_config.type=GOLDEN_SET, MAJORITY_VOTE, CAPTCHA, ASSIGNMENT_SUBMIT_TIME.

Parameters for collecting data (depends on the quality control rule specified in the type key).

configs.rules.action. parameters.skill_id

string | required if

Required if type=SET_SKILL_FROM_OUTPUT_FIELD.

ID of the skill to update as tasks are completed.

configs.rules.action. parameters.from_field

string | required if

Required if type=SET_SKILL_FROM_OUTPUT_FIELD.

The value to assign to the skill:

  • correct_answers_rate — The percentage of correct responses.

  • wrong_answers_rate — The percentage of incorrect responses.

configs.rules.action. parameters.skill_value

integer | required if

Required if type=SET_SKILL_FROM_OUTPUT_FIELD.

A fixed value to assign to the skill (a number from 0 to 100).

configs.rules.action. parameters.delta

integer | required if

Required if type=CHANGE_OVERLAP.

The value determines the amount to change the overlap by.
configs.rules.action. parameters.public_comment

string | required if

Required if type=REJECT_ALL_ASSIGNMENTS.

Comments (the reason for rejecting responses). Available to the requester and the performer.

captcha_frequency

string

The frequency of showing captchas:

  • LOW — Show one for every 20 tasks.

  • MEDIUM, HIGH — Show one for every 10 tasks.

By default, captchas aren't displayed.

configs.collector_config. parameters.history_size

integer

The maximum number of recently displayed captchas in the project to use for the calculation.

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

configs.rules.action. parameters.duration_unit

string

Ban duration unit:

  • MINUTES — Minutes

  • HOURS — Hours

  • DAYS — Days

  • PERMANENT — Permanent ban

configs.rules.action. parameters.duration

integer

Ban duration.

configs.rules. action.parameters. private_comment

string

Comments (the reason for blocking access). Visible only to the requester.

configs.rules.action. parameters.open_pool

boolean

Determines whether to re-open a closed pool:

  • true — Open the pool after making changes if it is closed.
  • false — Don't open the pool after making changes, if it is closed.