Test 9 Flashcards
S why
- noise distracts drivers
- higher fatalities in bus accidents
- have used music in past for ID students on bus
S1 subjects/setting
6-8th grade students
max 44 kids
25min ride
S1 apparatus
Noise guard
Noise guard threshold
Light display
S1 Noise guard
- like a microphone set up on the ceiling to track noise levels
- noise above 500Hz would activate it (length)
- recorded the umber of events over the threshold (in 10ths of seconds)
- threshold 93dB
S1 Light display
during treatment panel of 10 red lights on win shield
-went on to provide feedback every 0.1s above threshold
S1 behaviours
Out of seat
Roughhousing
Coercive comments
S1 Out of seat
any posterioral disconnection with the seat
S1 Roughhousing
aggressive nonverbal interaction
S1 coercive comments
-by driver
threats, warnings, reminders calling a Childs name without a comment within 3s.
S1 observation system and recording
observer coded data and recorder in bus
- 15s observation intervals (allowing 5s to record)
- recorded instances of target Bx per interval
- tape of drivers comments and scored later
- 10BL in afternoon to control for reactivity
S1 reliability
- once during each condition
- intervals agreed/total
- Divers comments: smaller/larger
S1 BL
kids told there would be an observer
S1 treatment
lights, music, raffles
-firsst day experimenter explained:
Lights on when too loud
Music on first day all times, after only when noise was low
Raffle for hamburger coupons each day if cut off criterion was not exceeded (previous day)
-students could make music suggestions
Raffle for 10 movie passes after 5 consecutive days
If one student intentionally turned on lights they would be reported to the principle
Driver told to do the same
S1 treatment phaseout
last week burger coupon raffle eliminated
movie pass changed from 10kids from 5 days, to 2 passes daily
music still everyday
S1 setting the cutoff criterions
could exceed threshold for limited time before music and raffle lost
- 1dt day 26s
- 2nd 13s
- 3rd 5s
S1 design
ABABC reversal
S1 results
BL 624.1 noise outbursts per trip average duration 62.3s
T: drastically reduced
BL: increase
Treatment phase out: results maintained
out of seat Bx decreased, but gradual increase ov er treatment
Roughhousing - decrease
Driver coercion - decreased during treatment 17-2.2
S1 discussion
- end of trips when criterion was exceeded
- had an effect on other Bx as well (out of seat/R)
- coercions from driver also decreased
- was liked by students
S1 limitations
- Out of seat/roughhousing recovered throughout treatment (addressed in E2 by lowering noise levels)
- need raffles not everyone may have access to prizes
S2 subjects and setting
6-8th grade
afternoon
44 max kids
S2 apparatus
Same as Exp 1
S lights instead of 10
-90dB SPL*
S2 Bx
-out of seat and roughhousing were recorded in alternating 15s record intervals
noted if one or more students doing Bx
-driver comments same as E1
S2 BL
This experimental condition was conducted identically with that of Experiment 1. Treatment (lights and preferred music). The treatment procedure was introduced and con- ducted in the same manner described in Ex- periment 1 except that no raffles were available. In addition, the cutoff criterion was reduced more gradually in this experiment.
S2 Exp design
ABAB reversal