Icrach 2016 gaurav

Effect of Music’s ‘In’ and ‘Out’ Impression on Vigilance Task Performance

Gaurav Kumar Rai and MansiRajiv Gandhi South CampusBHU, [email protected]

VigilanceVigilance, or sustained attention, refers to the ability to monitor displays for stimulus events over prolonged periods of time.Pe

rfor

man

ce

Time period

?

Impairment within 15-25 min.

Determinants of Vigilance Performance• Task Characteristics• Individual Characteristics• Environmental Characteristics

Arousal Theory

Obj

ectiv

eTo examine the effect of musical ‘In’ and ‘out’ impression on vigilance task performance.

Vigilance task performances were recorded in terms of Hit, False alarms, Response time, sensitivity (dˈ) and Response Bias (C).

Independent Variable

• Music ‘In’ Impression group

• Music ‘out’ impression Group

• Control Group

Dependent variable

• Accuracy• Response time• Perceptual

Sensitivity• Response Criterion• Mood• Physiological

performance

Task Properties & Schedule

Fixation (500 ms)

Target or Nontarget (100 ms)

Response Time (Max 1400ms)

Modality: Visual, Black figure on white background

Signal ratio: 1: 4

Signal probability: .20

Event rate: 30 events /minute

Vigilance Task

• Press space bar when you detect a big square• Blank screen will let you know time to respond

Musical ToneA Shahanai and Tabala duet instrumental toneRaga: Miyan ki todi, (bada khyal),

Morning raga 8 AM to 12 Noon (dutiya prahar)Increase physical arousalA 30 Minute tone were selected‘In’ and ‘Out’ impression were manipulated in Wave Pad sound Editor (open source software)

‘In’ Impression: Amplitude Increase across time period

‘Out’ Impression: Amplitude Decrease across time period

ProcedureConsent Form +

Biographical Questionnaire

Snellen Test (Eye Test)

Measure Height and weight

Instruction + Demo

(3 min.)

Practice Session (10 min)

Main Session (30min.)

Feed back

Musical tone for 30 min. induced here

Sample and Design 40 participants Mage ±SD= 23.34±2.22 years Normal (6/6) or corrected to normal

(6/9) on Snellen chart. A 3 (Groups) × 3 (Time period: Three

10-min. blocks)

Lab Setting

Distance PC to Eye= 12-18 inch

Experiment Cell (Height X width X Length)= 9’ X 6’6” X 6’8”

17 inch colour monitor

P-4 Processor and 512 MB RAM

Revolving Chair

Straight compact fluorescent light

White wall

Humidity Measurement Blood Pressure

Measurement

Oxygen Saturation in Blood (%SpO2)

Body temperature

Experimental Setting

Accuracy Interaction (F (4,74) =1.78, p =.14, eta2 =.08)Within (F (4,74) =18.56, p =.000, eta2 =.33)Between (F (2, 37) =.83, p =.44, eta2 =.04)

Total Hits b1 Total Hits b2 Total Hits b320.00

25.00

30.00

35.00

40.00

45.00

50.00Control Out impression In impression

Sensitivity (dˈ)

Dprimeb1 Dprimeb2 Dprimeb31.801.902.002.102.202.302.402.502.602.702.80

Control Out impression In impression

Interaction (F (4,74) =1.45, p =.22, eta2 =.07)Within (F (4,74) =19.68, p =.000, eta2 =.35)Between (F (2, 37) =.12, p =.89, eta2 =.00)

Response Bias (c)

Cb1 Cb2 Cb30.000.100.200.300.400.500.600.700.800.90


Interaction (F (4,74) =.93, p =.45, eta2 =.05)Within (F (4,74) =8.38, p =.001, eta2 =.18)Between (F (2, 37) =1.06, p =.35, eta2 =.05)

Response Time

Total Mean RTb1 Total Mean RTb2 Total Mean RTb3200.00

250.00

300.00

350.00

400.00

450.00

500.00


Interaction (F (4,74) =.84, p =.50, eta2 =.04)Within (F (4,74) =9.48, p =.000, eta2 =.20)Between (F (2, 37) =1.05, p =.35, eta2 =.05)

Energetic arousal

ea1 ea223.00

23.50

24.00

24.50

25.00

25.50

26.00

26.50Control Out impression In impression

Tense arousalInteraction (F (1,58)=.29p =.58, eta2 =.005)

ta1 ta212.0012.5013.0013.5014.0014.5015.0015.5016.00


Hedonic arousalInteraction (F (1,58)=5.79 p =.01, eta2 =.09)

ha1 ha224.0024.5025.0025.5026.0026.5027.0027.5028.0028.5029.00


Anger FrustrationInteraction (F (1,58)=1.07p =.30, eta2 =.02)

af1 af20.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Systolic Blood Pressure

Systolic pre Systolic post85.00

90.00

95.00

100.00

105.00

110.00

Control Out impressionIn impression

Diastolic pre Diastolic post54.0056.0058.0060.0062.0064.0066.0068.0070.0072.00


Body Temp pre Body Temp post97.9098.0098.1098.2098.3098.4098.5098.6098.70


Body

Tem

pera

ture

Dystonic Blood Pressure

%SpO2 pre %SpO2 post93.0094.0095.0096.0097.0098.0099.00


Pulse rate pre Pulse rate post72.0074.0076.0078.0080.0082.0084.00


Pulse Rate

%SpO2 (Oxygen Saturation)

Finding Shows that• Enhancing “Frequency” and

“Intensity” of musical tone has been able to – alter response time as vigilance task

Performance– Also enhancing hedonic arousal

• Furthermore researches needs to discriminate the effect of intensity and frequency.

Theoretical Application

These findings may be used to understanding of musical tone frequency and vigilance performanceBetter understanding of human performance under arousal states especially induced via musical tone

Application in Real World

Basic research on attention can successfully be applied to a number of human factors problems.The real world applications of these findings include domains in which monitoring plays a crucial part.

App

licat

ion

Thanks for yourPaying

attention

Icrach 2016 gaurav

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