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4 Results

4.1 Impact of Computer Game on Player

Emotional signals of the players during different computer game stages (with different asteroid generation frequency) were compared. Sub-intervals of spaceshipasteroid collisions environment were investigated when emotional signals as well as spaceship manoeuvring speed and acceleration were taken into account.

Significant changes in frustration and engagement were registered between Stage II and Stage III of the computer game (Table 1). At Stage II frustration increased while boredom decreased. A statistical tendency observed that excitement also increased ant Stage III. At Stage III manoeuvring speed was faster, but no significant changes in manoeuvring acceleration were observed.

Table 1. Changes in excitement, frustration, engagement, manoeuvring speed and acceleration during the experiment. Wilcoxon Signed Ranks Test.

The test for the sub-intervals of collision interval in excitement signal showed that there are significant change between sub-interval 1 and sub-interval 3 (Table 2). Excitement signal is increasing more often than decreasing after spaceship collision with an asteroid (comparing pre-collision and post-collision sub-intervals).

Table 2. Changes in excitement in collision interval when evaluating their sub-intervals. Wilcoxon Signed Ranks Test.

The test for the sub-intervals of collision interval in frustration signal showed that there are significant change between sub-interval 1 and sub-interval 2 (Table 3). Frustration signal is decreasing more often than increasing if comparing the pre-collision and collision sub-intervals.

Table 3. Changes in frustration in collision interval when evaluating their subintervals. Wilcoxon Signed Ranks Test.

Frustration

N

Mean rank

Z

P

Negative Ranks

60

54.43

sub-interval 3 – sub-interval 1

Positive Ranks

54

60.92

-0.03

0.97

Ties

1

-

Negative Ranks

77

60.48

sub-interval 2 – sub-interval 1

Positive Ranks

35

47.74

-4.33

<0.00

Ties

3

-

Table 4. Changes in manoeuvring speed in collision intervals when evaluating their subintervals. Wilcoxon Signed Ranks Test.

Speed

N

Mean rank

Z

P

Negative Ranks

48

61.99

sub-interval 2 – sub-interval 1

Positive Ranks

65

53.32

-0.702

0.483

Ties

2

-

Negative Ranks

39

59.74

sub-interval 3 – sub-interval 1

Positive Ranks

71

53.17

-2.155

0.031

Ties

5

Analysis of speed and acceleration changes in subintervals before and after collision revealed, that significant increase in speed is observed after collision (subinterval 3) comparing with speed before collision (sub-interval 1) (Table 4)

Changes in acceleration in three collision sub-intervals more frequently resembled U-shape form: acceleration decreased in sub-interval 2 comparing with sub-interval 1, and increased again in sub-interval 3 comparing with sub-interval 1 (Table 5).

Table 5. Changes in acceleration in collision intervals when evaluating their subintervals. Wilcoxon Signed Ranks Test.

Acceleration N Mean rank Z p

Negative Ranks sub-interval 3 – sub-interval 1 Positive Ranks

68 62.76

47 51.11 -2.604

0.009

Negative Ranks

sub-interval 2 – sub-interval 1

Positive Ranks

43 61.53

-1.923

72 55.89

0.055

The comparison of excitement, speed and acceleration sub-intervals showed negative correlations between some sub-intervals of the signals (Table 6). Post-collision sub-intervals of excitement signal correlate with all three speed sub-intervals.

Table 6. Relationship between excitement and speed and acceleration. Spearman rho.

Sub-

Speed Sub-

Sub-

Sub-

Acceleration Sub-

Sub-

Excitement interval 1 interval 2 interval 3 interval 1 interval 2 interval 3

Sub-interval 1

-0,010

-0,091

-0,123

-0,105

0,111

0,075

Sub-interval 2

-0,045

-0,123

-0,121

-0,143

0,138

0,096

Sub-interval 3

-0,217**

-0,246***

-0,205**

-0,066

0,158

0,053

**Correlation is significant at p<0.05, (2-tailed)

***Correlation is significant at p<0.01, (2-tailed)

The comparison of frustration, manoeuvring speed and acceleration sub-intervals showed positive correlations between pre-collision and collision sub-intervals of frustration and collision sub-interval of speed as well as pre-collision sub-intervals of acceleration signals (Table 7).

Table 7. Relationship between frustration and manoeuvring speed and acceleration. Spearman rho.

Sub-

Speed Sub-

Sub-

Sub-

Acceleration Sub-

Sub-

Frustration interval 1 interval 2 interval 3 interval 1 interval 2 interval 3

Sub-interval 1

0,127

0,194**

0,151

0,243***

0,169

0,025

Sub-interval 2

0,118

0,196**

0,167

0,213**

0,166

0,094

Sub-interval 3

0,009

0,111

0,034

0,141

0,162

0,023

**Correlation is significant at p<0.05, (2-tailed)

***Correlation is significant at p<0.01, (2-tailed)

 
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