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There
is a brief discussion in our paper
of the need for reform of how psychologists and some other researchers
analyse data and present findings. Since writing the paper the new
edition of the APA manual has appeared:
American
Psychological Association. (2001). Publication manual of the American
Psychological Association (5th ed.). Washington, DC: Author. http://www.apa.org/books/4200060.html
The following
quotes from the Manual indicate that effect size measures and confidence
intervals are likely to be required routinely by journal editors, and
will be seen often by anyone reading published research. These are highly
desirable developments.
For
the reader to fully understand the importance of your findings, it is
almost always necessary to include some index of effect size
or strength of relationship in your Results section. You can estimate
the magnitude of effect or the strength of the relationship with a number
of common effect size estimates... The general principle to be followed...
is to provide the reader not only with information about statistical
significance but also with enough information to assess the magnitude
of the observed effect or relationship. (pp. 25-26, emphasis added)
The
reporting of confidence intervals... can be an extremely effective way
of reporting results. Because confidence intervals combine information
on location and precision and can often be directly used to infer significance
levels, they are, in general, the best reporting strategy. The use of
confidence intervals is therefore strongly recommended. (p.
22, emphasis added)
The aim
of ESCI is to provide tools that may assist researchers, teachers and
students to explore the relevant concepts and to analyse and present their
data in accordance with these new requirements.
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