Caffeine and Its Effect on Reaction Time

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Stage
 1
 Psychology
  Research
 Report
  Affects
 of
 caffeine
 on
 reaction
 time
 
  Proposal:
 
  Caffeine
 is
 used
 by
 many
 people
 to
 increase
 their
 energy
 levels.
 It
 alters
 an
  individual’s
 alertness
 and
 their
 reaction
 time.
 Though
 the
 most
 common
 form
 of
  caffeine
 is
 coffee,
 it
 can
 also
 be
 found
 in
 certain
 soft
 drinks,
 chocolate,
 energy
  drinks
 and
 tea.
 When
 a
 person
 takes
 in
 caffeine,
 it
 increases
 the
 heart
 rate,
 which
  makes
 the
 blood
 get
 pumped
 around
 the
 body
 faster.
 Many
 people
 use
 caffeine
 to
  increase
 alertness
 throughout
 the
 day.
 
  The
 aim
 of
 this
 research
 is
 to
 investigate
 the
 link
 between
 caffeine
 intake
 and
  reaction
 time.
 Year
 11
 Psychology
 Students
 have
 participated
 in
 the
 study
 of
 a
  person’s
 reaction
 time
 after
 the
 intake
 of
 caffeine.
 Participants
 between
 the
 ages
  of
 15
 to
 17
 took
 part
 in
 this
 study.
 The
 class
 was
 split
 up
 into
 three
 randomly
  allocated
 groups
 and
 each
 ingested
 a
 cup
 of
 coffee.
 One
 group
 was
 given
 100%
  caffeine,
 another
 group
 was
 given
 50%
 caffeine
 (half
 caffeinated,
 half
 de-­‐ caffeinated)
 and
 the
 third
 group
 was
 given
 0%
 caffeine
 (de-­‐caffeinated).
 After
  half
 an
 hour
 was
 given,
 all
 participated
 in
 a
 reaction
 time
 test
 online.
 
 
  The
 data
 that
 was
 obtained
 from
 the
 study
 is
 objective
 quantitative
 data.
 The
  data
 will
 be
 presented
 in
 tables
 and
 box
 plots;
 to
 show
 how
 affects
 the
 reaction
  time
 of
 the
 participants.
 
 
  These
 results
 will
 be
 analyzed
 and
 used
 to
 answer
 the
 question:
 
  How
 does
 caffeine
 affect
 reaction
 time?
 
  Method:
  Each
 participant
 took
 part
 in
 an
 online
 reaction
 time
 test.
 This
 occurred
 30
  minutes
 after
 the
 consumption
 of
 coffee
 for
 all
 participants.
 Each
 participant
  took
 the
 test
 4
 times
 and
 then
 calculated
 the
 mean
 of
 their
 results.
 
 
 
  Results:
  Average
 reaction
 time,
 30
 minutes
 after
 coffee
 consumption
 
  Percentage
 of
 caffeine
  Reaction
 time
 in
 seconds
 
  0%
  0.57
 (0.51
 without
 outliner)
 
  50%
  0.328
 
  100%
  0.334
 
  Each
 average
 was
 calculated
 from
 a
 sample
 size
 of
 21
 participants
 between
 the
  ages
 of
 15-­‐18.
 
 This
 table
 shows
 that
 the
 average
 reaction
 time
 of
 the
 students
  who
 either
 consumed
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