Deadlines

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PSY2010 Statistics for Experimental Psychology
Deadlines
Assignment C (C1-C3) to be handed in by 4.30pm
Thursday 14th (TODAY) of December (in
Psychology Department) Your answers/discussion
of Practical exercise (P1-P10) also to be
handed-in by 4.30pm on Thursday 14th (TODAY) of
December (in Psychology Department). There will
be a final practical session used as a drop in
today at 12noon. Non-compulsory!
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PSY2010 Statistics for Experimental Psychology
Revision SPECIMEN EXAM PAPERSOLUTIONS (handed
out today) PSY294 (2004-2005) PAPER www.ncl.ac.u
k/exam.papers Week 12 lecture (Revision
Week) PSY294 (2004-2005) paper anything else you
would like to cover email to suggest topics
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PSY2010 Statistics for Experimental Psychology
Extensions to ANOVA
Previously we discussed factorial experiments and
these can be extended to several factors and
their interactions Minitab can deal with data
based on up to 5 factors and their
interactions
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PSY2010 Statistics for Experimental Psychology
Extensions to ANOVA
We may have to deal with nesting or structural
limitations If we have unbalanced experiments,
we have to use Generalised Linear Models (GLMs)
for our analysis
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PSY2010 Statistics for Experimental Psychology
Transformations
The methods of correlation, regression and ANOVA
are based on assumptions of Independence,
Normality and Common Variance Non-parametric
variants are available when these assumptions
are deemed to be invalid
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PSY2010 Statistics for Experimental Psychology
Transformations

• If the data is deemed to be non-Normal, sometimes
  it can be made Normal by a simple transformation
  of the data.
• Typical transformations are
• square root
• reciprocal
• logarithm

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PSY2010 Statistics for Experimental Psychology
Multivariate methods
Cluster analysis used to classify
individuals and separate them for further
analysis Discriminant analysis similar to
cluster analysis Principal Component Analysis
(PCA) method for reducing the number of
variables used to characterise a data set
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PSY2010 Statistics for Experimental Psychology
Overview

• I hope that this course has helped
  you to
• appreciate the need to use statistical methods
  in the analysis of data arising in investigations
  in Psychology and allied subjects

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PSY2010 Statistics for Experimental Psychology
Overview
On a practical note, you should now be able to

• state and test hypotheses relating to
  correlation, regression and the various types of
  analysis of variance and their non-parametric
  equivalents.
• understand the purpose of these techniques and
  be able to distinguish the circumstances in which
  each is used.

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PSY2010 Statistics for Experimental Psychology
Overview
And finally

• Be able to state conclusions both in statistical
  terminology and in non-statistical terms related
  to the context of the experiment.

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PSY2010 Statistics for Experimental Psychology
EXAM DATE
Tuesday 16th January 2.00pm (A-D) Tower
118 (E-Minton) Cassie 2.32 (Moffat-Z) BTC LG38