anchor_estimate_ma: Meta-Analysis Example - Anchor Estimate
In gitrman/itns: Datasets from the book Introduction to the New Statistics

Description Usage Format Details Source References

An example dataset used in Chapter 9 of the book Introduction to the New Statistics.

1	anchor_estimate_ma

A data frame with 30 rows and 9 variables:

location: Name of the lab
m_lowanchor: Mean for those given the low anchor
sd_lowanchor: Standard deviation for those given the low anchor
n_lowanchor: Sample size for those given the low anchor
m_highanchor: Mean for those given the high anchor
sd_highanchor: Standard deviation for those given the high anchor
n_highanchor: Sample size for those given the high anchor
subset: Factor indicating whether the study was conducted in the USA or not
country: Factor with 12 levels indicating the country where the study was conducted

To what extent does the wording of a question influence one's judgement? This data investigates a specific type of wording influence: a numerical anchor. Participants were asked to estimate three different quantities (number of babies born in the U.S. each day; population of Chicago; height of Mounter Everest). For each question, though, participants were either given a low or high numerical anchor. For example, they were told either that the number of babies born in the U.S. was more than 200,000 (low anchor) or less than 5,000,000 (high anchor). The question is: to what extent does having a low or high anchor in mind influence the estimate made?

This dataset provides summaries for 30 of the 36 different labs that tried to replicate this classic effect. This is the data for the estimated number of babies born/day in the U.S.

This is data is available online at https://osf.io/wx7ck from this study: Klein, R. A., Ratliff, K. A., Vianello, M., Adams ., R. B., Bahnik, S., Bernstein, M. J., ... & Nosek, B. A. (2014). Investigating Variation in Replicability. Social Psychology, 45, 142-152. http://doi.org/10.1027/1864-9335/a000178

The original study exploring this effect is: Jacowitz, K. E., & Kahneman, D. (1995). Measures of Anchoring in Estimation Tasks. Personality and Social Psychology Bulletin, 21(11), 1161-1166. http://doi.org/10.1177/01461672952111004

Cumming, G., & Calin-Jageman, R. (2017). Introduction to the New Statistics. New York; Routledge.

gitrman/itns documentation built on May 17, 2019, 5:29 a.m.