MTurkR (version 0.5.1)

GenerateQualificationRequirement: Generate QualificationRequirement

Description

Generate a QualificationRequirement data structure for use with CreateHIT or RegisterHITType.

Usage

GenerateQualificationRequirement(qual, 
                                 comparator, 
                                 value, 
                                 preview = NULL, 
                                 qual.number = NULL)

Arguments

qual

A character string containing a QualificationTypeId, or a vector of QualificationTypeIds. This parameter also accepts shorthand labels for built-in QualificationTypes: Approved (percent of assignments approved), NumberApproved

comparator

A character string containing a comparator, or a vector of comparators, by which a worker's score of a qualification is compared to the specified value. One of <,<=< code="">,>,>=,==,

value

A numeric or character string value (or vector of such) against which workers scores will be compared. Must be a non-negative integer, except when qualification="Locale" (when it must be a two-digit country code) or when comparator

preview

An optional logical specifying whether a worker must have the Qualification in order to preview the HIT on the MTurk worker site. The default is FALSE.

qual.number

An argument for primarily internal use.

Value

• Returns a character string (of class QualificationRequirement) containing URL-encoded QualificationRequirements.

Details

A convenience function to translate the details of a QualificationRequirement into the necessary structure for use in the qual.req parameter of CreateHIT or RegisterHITType. The function accepts three required parameters: qual, comparator, and value. qual must be a valid QualificationTypeId for either a built-in QualificaitonType (see ListQualificationTypes) or a custom QualificationType (e.g., one created with CreateQualificationType). Multiple QualificationRequirements can be generated in one call --- that is, if a requester intends to impose multiple QualificationRequirements on a single HITType, those requirements must be specified in a single call to GenerateQualificationRequirements. Once attached to a HITType, only workers who meet all of the specified QualificationRequirements can complete assignments for a HIT of that HITType.

References

http://docs.amazonwebservices.com/AWSMechTurk/latest/AWSMturkAPI/ApiReference_QualificationRequirementDataStructureArticle.html{API Reference}

See Also

CreateHIT RegisterHITType

Examples

a <- ListQualificationTypes()[2,2] # Number of HITs Approved
# one QualificationRequirement
q1 <- GenerateQualificationRequirement(a,">","90")
# two QualificationRequirements
q2 <- GenerateQualificationRequirement(c("Locale","Approved"), 
                                       c("==",">"), 
                                       c("US",90), 
                                       preview = TRUE)
# one QualificationRequirement using the `In` comparator
q3 <- GenerateQualificationRequirement("Locale","In","US,UK")
# two QualificationRequirements using the `In` comparator
q4 <- GenerateQualificationRequirement(c("Locale","Approved"), 
                                       c("==",">"), 
                                       c("US,UK,DK",90), 
                                       preview = c(TRUE,FALSE))
# `Exists` comparator
q5 <- GenerateQualificationRequirement("Approved", "Exists", "")