Research methods quiz OCR

One billion (1,000,000,000) is a very big number. The brain is estimated to have one hundredbillion neurons (nerve cells). What is this written in standard form?

• 10⁸

• 10⁹

• 10¹⁰

• 10¹¹

A psychologist conducted a study investigating reaction times of a group of young and old people to press a key on a keyboard in response to a specific stimuli (e.g. a smiley face). The mean reaction time for young people was 0.7245 seconds. What is this written to two decimal places?

• 0.7

• 0.72

• 0.73

• 0.74

A psychologist conducted a study investigating reaction times of a group of young and old people to press a key on a keyboard in response to a specific stimuli (e.g. a smiley face). The mean reaction time for old people was 1.1834 seconds. What is this written to two

significant figures?

• 1.1

• 1.18

• 1.2

• 1.9

What is the symbol for ‘much greater than’?

• <

• <<

• >

• >>

If a researcher checks to see if participants have answered questions that ask about the samething in the same or similar way, what is this?

• external reliability

• external validity

• internal reliability

• internal validity

What term refers to whether research relates to everyday life?

• ecological validity

• face validity

• internal validity

• population validity

A psychologist conducted a survey assessing beliefs in the paranormal with a sample of 144 people. 25% of people said they believe in ghosts. How many people is this?

• 25

• 36

• 40

• 72

A psychologist conducted a survey assessing beliefs in the paranormal with a sample of 144 people. 24 people said they believe aliens exist. What fraction of the sample is this?

• 1/3

• 1/4

• 1/6

• 2/3

What type of a rating scale is a semantic differential?

• one that has images at either end

• one that has numbers at each point along the scale

• one that ranges from ‘strongly agree’ to ‘strongly disagree’

• one with words having opposite meaning at either end

Which of these descriptive statistics would it be possible to use with nominal data?

• mean

• median

• mode

• range