Full Discussion: Using AWK to Calculate Correct Responses
Using AWK to Calculate Correct Responses Post 302521217 by Jahn on Tuesday 10th of May 2011 03:04:43 PM
Using AWK to Calculate Correct Responses

Hello,

I am trying to count how many times a subject makes a correct switch or a correct stay response in a simple task. I have data on which condition they were in (here, labeled "IMAGINE" and "RECALL"), as well as whether they made a left or right button response, and whether the outcome was an error or a correct outcome.

In the IMAGINE condition, I am coding their response as correct if they receive a correct outcome and make the same response on the next trial. I am also coding their response as correct if they receive an error outcome and switch their response on the next trial.

In the RECALL condition, I am coding their response as correct if they make the same response as they did on the previous trial, regardless of whether they received a correct or error outcome on that trial.

Here is a sample of the output I am trying to run through awk:

The data are in groups of three. For example, the first three lines can be thought of as: "Condition = IMAGINE, Response = left, Outcome = correct".

What I want to do is tally how many correct or incorrect switches they made in each condition. In this example, the first response results in a correct outcome, and the subject makes the same response on the next trial, which would be counted as a correct response. On the RECALL trial, the participant also makes a correct response, since the response is the same as the last trial, even though that trial resulted in an error outcome. The last trial is actually an incorrect response, since it is in the IMAGINE condition and the last outcome was correct, and they switched their response.

Is awk the best tool to use for this? My problem is that I need to store the previous response and outcome, and then compare it against the current response and outcome, taking into account which condition it is. Any help would be greatly appreciated.

Thanks,

-Jahn
 Jahn View Public Profile for Jahn Find all posts by Jahn
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```WWW::CNic::Response(3pm)				User Contributed Perl Documentation				  WWW::CNic::Response(3pm)

NAME
WWW::CNic::Response - base class for WWW::CNic response objects.

SYNOPSIS
use WWW::CNic;

my \$query = WWW::CNic->new( OPTIONS );

my \$response = \$query->execute();

DESCRIPTION
This is the base class for all response objects returned by WWW::CNic. Each query type returns a different object, all of which inherit
their basic functionality from this module.

This module should never be accessed directly, only through its children.

METHODS
All the child classes of WWW::CNic::Response inherit the following methods:

\$response->is_success();

This returns true if the transaction was completed successfully. If there was a server-side error due to invalid data or a system error, or
there was an HTTP error this method will return undef.

\$response->is_error();

This is the converse of "is_success". It returns true if there was an error.

\$response->error();

This returns the error message generated, if any. This can be either a server-side error message or an HTTP error.

\$response->message();

This returns the message returned when the transaction was successful.

\$response->keys();

This returns an array containing all the keys returned by the server.

\$response->response(\$key);

This returns the value corresponding to \$key as returned by the server. This may be a scalar, or a reference to an array or hash, depending
on the context.

\$response->dump();

This prints a human-readable dump of the data stored in the object to "STDOUT". Mainly useful in debugging.

This module is (c) 2011 CentralNic Ltd. All rights reserved. This module is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.