TurkPrime Blog

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How to Obtain an Online National Sample Stratified by Wealth

Posted by TurkPrime on Oct 10, 2018 4:34:38 PM

A case study from a recent JESP article

A new study appearing in the Journal of Experimental Social Psychology suggests Americans strongly believe in economic mobility because they fail to appreciate how vast wealth inequality really is. In this blog, we review the study and highlight how Prime Panels helped the author obtain a nationally stratified sample based on wealth, strengthening the study’s findings and generalizability.

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Topics: prime panels, sampling, representative samples, research methods

The Universal Exclude List: A Tool for Blocking Bad Workers

Posted by TurkPrime on Oct 4, 2018 3:04:50 PM

By now, even casual users of MTurk have heard about recent concerns of “bots” or low quality data. We’ve written about the topic here and laid out evidence that suggests “bots” are actually foreign workers using tools to obscure their true location (here). Perhaps most importantly, we’ve created two tools to help keep these workers out of your studies. In this blog, we introduce a third tool: the Universal Exclude List.

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After the Bot Scare: Understanding What’s Been Happening with Data Collection on MTurk and How to Stop it

Posted by TurkPrime on Sep 18, 2018 2:07:52 PM


  • Since early August, researchers have worried that “bots” are contaminating data collected on MTurk.
  • We found workers who submit HITs from suspicious geolocations are using server farms to hide their true location.
  • When using TurkPrime tools to block workers from server farms, we collected high quality data from MTurk workers.
  • We also collected data from workers who use server farms to learn more about them.
  • Our evidence suggests recent data quality problems are tied to foreign workers, not bots.

In this blog, we review recent data quality issues on Mechanical Turk and report the results of a study we conducted to investigate the problem.

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Topics: turkprime, bots, server farms, data quality, high quality data

Upcoming New Content on the Blog

Posted by TurkPrime on Nov 17, 2017 11:43:00 AM

Greetings Reader,

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Topics: amazon mechanical turk, online research, primepanels, turkprime

Verified US Region Targeting

Posted by TurkPrime on Dec 2, 2016 1:22:00 PM


Many researchers wish to target participants from specific states or regions of the United States like the Northeast or the West. The problem they often encounter is that using MTurk's Geographic Qualification to specify a particular state is often not adequate to ensure participants actually reside in the specified state.

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Topics: amazon mechanical turk, exclude workers, IP address, IP block, location, region, survey, turkprime

The New New Demographics on Mechanical Turk: Is there Still a Gender Gap?

Posted by TurkPrime on Mar 12, 2015 4:56:00 AM


In this blog, we report on the demographics of Mechanical Turk workers by reviewing 75 studies conducted with US-based Workers in 2013 and 2014. From a total of 32,595 Workers, we found 15,324 were female (47%).


It’s been a while since the last update on the demographics of Mechanical Turk Workers, so we thought it’s time for a new look. The current consensus seems to be that MTurk Workers are primarily female. For example, Panos Ipeirotis' blog reports that US-based Workers are 65% female. MTurk is always changing, though, so this report presents data from 75 studies conducted over the last two years.

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Topics: amazon mechanical turk, demographics, gender gap, mechanical turk