# Caffeine and Its Effect on Reaction Time

Topics: Caffeine, Coffee, Tea Pages: 17 (557 words) Published: March 10, 2013
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
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
throughout
the
day.

The
aim
of
this
research
is
to
investigate
the
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
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