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| author | Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp> |
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| date | Thu, 18 Jun 2015 23:08:28 +0900 |
| parents | 51b87e0db067 |
| children | 3325edf9139f |
| rev | line source |
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| 0 | 1 title: A Novel Greeting System Selection System for a Culture-Adaptive Humanoid Robot |
| 2 author: Tatsuki KANAGAWA <br> Yasutaka HIGA | |
| 3 profile: Concurrency Reliance Lab | |
| 4 lang: Japanese | |
| 5 | |
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6 # Abstract: Robots and cultures |
| 0 | 7 * Robots, especially humanoids, are expected to perform human-like actions and adapt to our ways of communication in order to facilitate their acceptance in human society. |
| 8 * Among humans, rules of communication change depending on background culture. | |
| 9 * Greeting are a part of communication in which cultural differences are strong. | |
| 10 | |
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11 # Abstract: Summary of this paper |
| 0 | 12 * In this paper, we present the modelling of social factors that influence greeting choice, |
| 13 * and the resulting novel culture-dependent greeting gesture and words selection system. | |
| 14 * An experiment with German participants was run using the humanoid robot ARMAR-IIIb. | |
| 15 | |
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16 # Introduction: Acceptance of humanoid robots |
| 0 | 17 * Acceptance of humanoid robots in human societies is a critical issue. |
| 18 * One of the main factors is the relations ship between the background culture of human partners and acceptance. | |
| 19 * ecologies, social structures, philosophies, educational systems. | |
| 20 | |
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21 # Introduction: Culture adapted greetings |
| 0 | 22 * In the work Trovat et al. culture-dependent acceptance and discomfort relating to greeting gestures were found in a comparative study with Egyptian and Japanese participants. |
| 23 * As the importance of culture-specific customization of greeting was confirmed. | |
| 24 * Acceptance of robots can be improved if they are able to adapt to different kinds of greeting rules. | |
| 25 | |
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26 # Introduction: Methods of implementation adaptive behaviour |
| 0 | 27 * Adaptive behaviour in robotics can be achieved through various methods: |
| 28 * reinforcement learning | |
| 29 * neural networks | |
| 30 * generic algorithms | |
| 31 * function regression | |
| 32 | |
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33 # Introduction: Greeting interaction with robots |
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34 * Robots are expected to interact and communicate with humans of different cultural background in a natural way. |
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35 * It is there therefore important to study greeting interaction between robots and humans. |
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36 * ARMAR-III: greeted the Chancellor of Germany with a handshake |
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37 * ASIMO: is capable of performing a wider range of greetings |
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38 * (a handshake, waving both hands, and bowing) |
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39 |
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40 # Introduction: Objectives of this paper |
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41 * The robot should be trained with sociology data related to one country, and evolve its behaviour by engaging with people of another country in a small number of interactions. |
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42 * For the implementation of the gestures and the interaction experiment, we used the humanoid robot ARMAR-IIIb. |
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43 * As the experiment is carried out in Germany, the interactions are with German participants, while preliminary training is done with Japanese data, which is culturally extremely different. |
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45 # Introduction: ARMAR-IIIb |
| 5 | 46 <img src="pictures/ARMAR-IIIb.png" style='width: 350px; height: 350px; margin-left: 200px;'> |
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47 |
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48 # Introduction: Target scenario |
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49 * The idea behind this study is a typical scenario in which a foreigner visiting a country for the first time greets local people in an inappropriate way as long as he is unaware of the rules that define the greeting choice. |
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50 * (e.g., a Westerner in Japan) |
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51 * For example, he might want to shake hands or hug, and will receive a bow instead. |
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52 |
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53 # Introduction: Objectives of this work |
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54 * This work is an application of a study of sociology into robotics. |
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55 * Our contribution is to synthesize the complex and sparse data related to greeting types into a model; |
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56 * create a selection and adaptation system; |
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57 * and implement the greetings in a way that can potentially be applied to any robot. |
| 0 | 58 |
| 2 | 59 # Greeting Selection: Greetings among humans |
| 60 * Greetings are the means of initiating and closing an interaction. | |
| 61 * We desire that robots be able to greet people in a similar way to humans. | |
| 62 * For this reason, understanding current research on greetings in sociological studies is necessary. | |
| 63 * Moreover, depending on cultural background, there can be different rules of engagement in human-human interaction. | |
| 64 | |
| 65 # Greeting Selection: Solution for selection | |
| 66 * A unified model of greetings does not seem to exist in the literature, but a few studies have attempted a classification of greetings. | |
| 67 * Some more specific studies have been done on handshaking. | |
| 68 | |
| 69 # Greeting Selection: Classes for greetings | |
| 70 * A classification of greetings was first attempted by Friedman based on intimacy and commonness. | |
| 71 * The following greeting types were mentioned: smile; wave; nod; kiss on mouth; kiss on cheek; hug; handshake; pat on back; rising; bow; salute; and kiss on hand. | |
| 72 * Greenbaum et al. also performed a gender-related investigation, while [24] contained a comparative study between Germans and Japanese. | |
| 73 | |
| 74 # Greeting Selection: Factors on Classification | |
| 75 * 'terms' : same terms with different meanings, or different terms with the same meaning. | |
| 76 * 'location' : influences intimacy and greeting words. (private or public) | |
| 77 * 'intimacy' : is influenced by physical distance, eye contact, gender, location, and culture. (Social Distance) | |
| 78 * 'Time' : time of the day is important for the choice of words. | |
| 79 * 'Politeness', 'Power Relationship', 'culture' and more. | |
| 80 | |
| 81 # Greeting Selection: Factors on Classification | |
| 82 * the factors to be cut are greyed out. | |
| 83 | |
| 5 | 84 <img src="pictures/factors.png" style='width: 60%; margin-left: 150px; margin-top: -50px;'> |
| 85 | |
| 2 | 86 # Model of Greetings: Assumptions (1 - 5) |
| 87 * The simplification was guided by the following ten assumptions. | |
| 88 * Only two individuals (a robot and a human participant): we do not take in consideration a higher number of individuals. | |
| 89 * Eye contact is taken for granted. | |
| 90 * Age is considered part of 'power relationship' | |
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91 * Regionally is not considered. |
| 2 | 92 * Setting is not considered |
| 93 | |
| 94 # Model of Greetings: Assumptions (6 - 10) | |
| 95 * Physical distance is close enough to allow interaction | |
| 96 * Gender is intended to be a same-sex dyad | |
| 97 * Affect is considered together with 'social distance' | |
| 98 * Time since the last interaction is partially included in 'social distance' | |
| 99 * Intimacy and politeness are not necessary | |
| 100 | |
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101 # Model of Greetings: Basis of classification |
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102 * Input |
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103 * All the other factors are then considered features of a mapping problem |
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104 * They are categorical data, as they can assume only two or three values. |
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105 * Output |
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106 * The outputs can also assume only a limited set of categorical values. |
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107 |
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108 # Model of Greetings: Features, mapping discriminants, classes, and possible status |
| 5 | 109 <img src="pictures/classes.png" style='width: 60%; margin-left: 150px;'> |
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110 |
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111 # Model of Greetings: Overview of the greeting model |
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112 * Greeting model takes context data as input and produces the appropriate robot posture and speech for that input. |
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113 * The two outputs evaluated by the participants of the experiment through written questionnaires. |
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114 * These training data that we get from the experience are given as feedback to the two mappings. |
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115 |
| 5 | 116 # Model of Greetings: Overview of the greeting model |
| 117 <img src="pictures/model_overview.png" style='width: 75%; margin-left: 120px;'> | |
| 118 | |
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119 # Greeting selection system training data |
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120 * Mappings can be trained to an initial state with data taken from the literature of sociology studies. |
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121 * Training data should be classified through some machine learning method or formula. |
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122 * We decided to use conditional probabilities: in particular the Naive Bayes formula to map data. |
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123 * Naive Bayes only requires a small amount of training data. |
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124 |
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125 # Model of Greetings: Details of training data |
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126 * While training data of gestures can be obtained from the literature, data of words can also be obtained from text corpora. |
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127 * English: English corpora, such as British National Corpus, or the Corpus of Historical American English, are used. |
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128 * Japanese: extracted from data sets by [24, 37, 41-43]. Analyze Corpus on Japanese is difficult. |
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129 |
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130 # Model of Greetings: Location Assumption |
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131 * The location of the experiment was Germany. |
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132 * For this reason, the only dataset needed was the Japanese. |
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133 * As stated in the motivations at the beginning of this paper, the robot should initially behave like a foreigner. |
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134 * ARMAR-IIIb, trained with Japanese data, will have to interact with German people and adapt to their customs. |
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135 |
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136 # Model of Greetings: Mappings and questionnaires |
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137 * The mapping is represented by a dataset, initially built from training data, as a table containing weights for each context vector corresponding to each greeting type. |
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138 * We now need to update these weights. |
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139 |
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140 # feedback from three questionnaires |
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141 * Whenever a new feature vector is given as an input, it is checked to see whether it is already contained in the dataset or not. |
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142 * In the former case, the weights are directly read from the dataset |
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143 * in the latter case, they get assigned the values of probabilities calculated through the Naive Bayes classifier. |
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144 * The output is the chosen greeting, after which the interaction will be evaluated through a questionnaires. |
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145 |
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146 # Model of Greetings: Three questionnaires for feedback |
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147 * answers of questionnaires are five-point semantic differential scale: |
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148 1. How appropriate was the greeting chosen by the robot for the current context? |
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149 2. (If the evaluation at point 1 was <= 3) which greeting type would have been appropriate instead? |
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150 3. (If the evaluation at point 1 was <= 3) which context would have been appropriate, if any, for the greeting type of point 1? |
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151 |
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152 # Model of Greetings: feedback and terminate condition |
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153 * Weights of the affected features are multiplied by a positive or negative reward (inspired by reinforcement learning) which is calculated proportionally to the evaluation. |
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154 * Mappings stop evolving when the following two stopping conditions are satisfied |
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155 * all possible values of all features have been explored |
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156 * and the moving average of the latest 10 state transitions has decreased below a certain threshold. |
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157 |
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158 # Model of Greetings: Summary |
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159 * Thanks to this implementation, mappings can evolve quickly, without requiring hundreds or thousands of iterations |
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160 * but rather a number comparable to the low number of interactions humans need to understand and adapt to social rules. |
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161 |
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162 # TODO: Please Add slides over chapter (3. implementation of ARMAR-IIIb) |
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163 |
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164 |
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| 167 </style> | |
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| 169 <!-- vim: set filetype=markdown.slide: --> |