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Psychology
Research Methods
Distributions
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Created by
Preet Dukhi
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Cards (30)
What is an IQ test primarily composed of?
A series of
logic questions
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What does an IQ score measure?
It measures
intelligence
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What is the average IQ score?
100
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What does a higher IQ score indicate?
Greater
intelligence
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How do most people's IQ scores relate to the average?
They score close to
100
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What shape does the distribution of IQ scores form on a graph?
A
bell shape
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What is the term for the common distribution of data in statistics?
Normal distribution
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What are the characteristics of a normal distribution?
Symmetrical curve
Mean
,
median
, and mode are equal
Sides do not touch the
x-axis
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What does the y-axis represent in a histogram?
Frequency
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What does the x-axis represent in a histogram?
Value of the
scores
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What does the mode represent in a normal distribution?
The
most
common
score
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How is the median defined in a normal distribution?
It is the
middle score
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What does the mean represent in a normal distribution?
The
average score
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How does the standard deviation relate to normally distributed data?
It indicates how far scores are from the
mean
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What percentage of scores falls within one standard deviation of the mean?
68%
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What percentage of scores falls within two standard deviations of the mean?
95%
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What percentage of scores falls within three standard deviations of the mean?
99.7%
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What does a score of 130 on an IQ test indicate?
Top
2.5%
of the population
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How is abnormality defined in psychology regarding IQ scores?
As
statistically
infrequent
scores
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What are the characteristics of skew distributions?
Scores shifted to one side
Long tail either to the right (
positive skew
) or left (
negative skew
)
Not
symmetrical
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What indicates a positive skew in a distribution?
Long tail pointing to the
right
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What indicates a negative skew in a distribution?
Long tail pointing to the
left
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How does a well-constructed test typically distribute scores?
Most scores around the
middle
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What happens to the distribution if a test is too easy?
Most scores will be
high
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What happens to the distribution if a test is too hard?
Most
scores
will be low
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How do the measures of central tendency behave in skew distributions?
Mode
: highest point on the graph
Mean
: pulled towards the tail
Median: between mode and mean
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What is the purpose of the tutorial videos mentioned in the material?
To provide
exam tips
and
worked examples
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Who can access bonus resources on psych boost?
Patreon
supporters
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What is the significance of the support from patrons on Patreon?
It allows
part-time
teaching and content creation
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What is the focus of the next research methods video mentioned?
Research methods unit
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