Software


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flankr — An R Package Implementing Computational Models of Attentional Selectivity

Grange, J.A. [Author, Creator]

flankr is an R package allowing users to engage with two recent computational models if attentional selectivity (for example, during the Eriksen Flanker task): The Shrinking Spotlight (SSP) model, and the Dual-Stage Two-Phase (DSTP) model. flankr allows the user to simulate data from both models, and to fit each model to human data. flankr provides statistics of the goodness-of-fit to human data, allowing users to engage in competitive model comparison.

Obtain the software: https://github.com/JimGrange/flankr
Read about the software: Grange, J.A. (in press). Behavior Research Methods.


trimr — An R Package Implementing Common Response Time Trimming Methods

Grange, J.A. [Author, Creator]

trimr is an R package that implements most commonly used response time trimming methods. Some of these methods are very simple to implement in standard software (such as removing all RTs slower than 2 seconds); some are intermediate in terms of difficulty of implementation (such as removing all RTs slower than 2.5 standard deviations above the mean of each participant for each condition); some are downright tricky to implement (such as the modified recursive procedure of van Selst & Jolicoeur, 1994). trimr implements all of these methods, allowing the user to go from a raw data file to a finalised data file containing trimmed RTs ready for inferential analysis.

Obtain the software:

Read about the software:


CDF-XL — Computing Cumulative Distribution Frequencies of Reaction Time Data in Excel

Houghton, G. [Author, Creator]
Grange, J.A. [Author]

In experimental psychology, central tendencies of reaction time (RT) distributions are used to compare different experimental conditions. This emphasis on the central tendency ignores additional information that may be derived from the RT distribution itself. One method for analysing RT distributions is to construct cumulative distribution frequency plots (CDFs; Ratcliff, Psychological Bulletin 86:446-461, 1979). However, this method is difficult to implement in widely available software, severely restricting its use. In this software, we present an Excel-based program, CDF-XL, for constructing and analysing CDFs, with the aim of making such techniques more readily accessible to researchers.

Obtain the software: Psychonomic Society Archives.
Read about the software: Houghton, G. & Grange, J.A. (2011). Behavior Research Methods.