Comparison of Task Completion Times of 4 Navigation Techniques and 2 Input Methods by 36 Subjects Source FG Wu H Lin M You 2011 The Enhanced Navigator for the Touch Screen A Comparative Study on Navigational Techniques of Web Maps ID: 583159
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Slide1
Repeated Measures ANOVA
Comparison of Task Completion Times of 4 Navigation Techniques and 2 Input Methods by 36 Subjects
Source: F.-G. Wu, H. Lin, M. You (2011). "The Enhanced Navigator for the Touch Screen: A Comparative Study on Navigational Techniques of Web Maps,"
Displays
, Vol. 32, pp. 284-295.Slide2
Data Description and Model
Experiment Conducted to Compare Effects of Navigation Technique and Input Method on Task Completion Times
Factor A (Fixed): Navigation Technique: CPB, DPB, ENCC, G&D
CPB = Combined Panning Buttons, DPB = Distributed Panning ButtonsENCC = Enhanced Navigator w/ Continuous Control, G&D = Grab&DragFactor B (Fixed): Input Method: Direct-Touch, MouseFactor C (Random): 36 Subjects measured on all 8 TreatmentsResponse is time to complete navigation task.Data simulated to match authors’ results (Means, F-tests)Slide3
Data – Multivariate FormSlide4
Variance-Covariance Matrix for 8 Navigation Treatments
The Variance of the 36 measurements for
NavTrt
1 (NavTech=1, InpMeth=1) is 1057.12The Covariance of the 36 Measurements for NavTrt’s 1 and 2 (NT=1, IM=2) is -8.03Slide5
Sphericity
AssumptionSlide6
Sphericity
Assumption ContinuedSlide7
Mauchley
TestSlide8
C
Matrix and
CSC’
MatrixSlide9
Mauchley
TestSlide10
Degrees of Freedom AdjustmentsSlide11
Multivariate Tests for Within-Subjects Factor(s)Slide12
Multivariate Tests for Within Subjects Factor(s)Slide13
S
E
SH (SE)-1SH MatricesSlide14
Wilk’s
LSlide15
Pillai’s TraceSlide16
Hotelling-Lawley
TraceSlide17
Roy’s Largest Root
Largest eigenvalue is 2.899115 (Computed in R) Slide18
Multivariate Tests for Within-Subjects Factor(s)Slide19
Test For Navigation Technique
Wilks’
L
Pillai’s Trace
Hotelling-Lawley
Trace
& Roy’s Largest RootSlide20
F-Tests for Navigation Technique EffectsSlide21
Test For
Input Method
Wilks’
L
Pillai’s Trace
Hotelling-Lawley
Trace
& Roy’s Largest RootSlide22
F-Tests for Input Method EffectsSlide23
Test For
NavTech
/
InpMeth Interaction
Wilks’
L
Pillai’s Trace
Hotelling-Lawley
Trace
& Roy’s Largest RootSlide24
F-Tests for Navigation Technique Effects