第 9 章 結 論 89
9.2 将来の発展
研究全体の背景でも述べたように，振動触覚という物理的なオブジェクトに触れた 情報を体現した技術は携帯端末やゲームに用いられている．同様に，概念的情報を体 現する新たな振動フィードバックにおいても様々な端末に将来用いられることが十分 に考えられる．これまで，振動フィードバックはその意味を考えることなく設計され てきたが，本研究によってフィードバックを設計する側に新たな可能性を与えること が期待できる．
研究の課題としては，例として挙げた応用アプリケーションの実装とユーザへの影 響の調査である．想定できる使用例として挙げたものの，その実用性についてはまっ たく評価を行っていない．また，本研究は基本的に実験室環境でおこなったため，その アプリケーションを使用する実際の状況では同様の効果を得ることができるかは調査 する必要がある．そして，複数のアクチュエータを用いた振動パターンの作成である．
本研究では単一の振動子を強弱を時系列で表現することで振動パターンとした．しか し，複数のアクチュエータを用いて時系列または同時に作動させることでパターンを 作り出す研究が行われている[132, 146]．そこで，本研究でも振動子の数を増やすこと で，これまでに出来なかった概念的情報の体現も行うことができると考える．
謝 辞
本研究を行うにあたり，山梨大学工学部 木下雄一朗准教授には研究の機会を賜り，
数々の貴重な御指導，御助言をいただきました．まだ知識が至らない私に，HCI分野 における多くの知見を示していただきました．また研究内容のみならず，修了後の進 路や学生生活についても多くの御助言をいただきました．木下准教授の御指導のもと，
研究を行えましたことを感謝申し上げます．
山梨大学工学部 郷健太郎教授には，本研究を進めるにあたり様々な場面において丁 寧で貴重な御助言をいただいたことを心より感謝いたします．研究の方向性を模索し ていた折，郷教授からの御助言によって研究を進めることができました．郷教授の御 協力のもと，研究を行えましたことを重ねて感謝申し上げます．
本研究の審査を務めていただきました，山梨大学工学部 茅暁陽教授，小澤賢司教授，
小俣昌樹准教授，北村敏也准教授には，研究発表や研究へのご助力，日々の講義など 様々な場面において研究の内容について貴重なご助言をいただいたことを心より感謝 致します．
郷研究室の皆様には，木下研究室との全体ゼミや各発表会の準備など，研究につい て多くの御意見をいただきました．研究の様々な場面において御協力いただいたこと を深く感謝申し上げます．
研究全般にわたってご協力いただいた木下研究室の皆様に深く感謝申し上げます．先 輩である，鈴木圭佑様と中野友文様には，研究を進めるにあたり数々の貴重な御助言 をいただきました. また，研究室での生活においても様々な場面でご協力頂き心より 感謝申し上げます．また，同輩である鈴木拓海様と甲賀まゆみ様，後輩である坂本凌 様，岡洋介様，小宮山憂様，増田愛美様，藤原耕平様，塚田悠斗様，戸塚敬様，西尾昌 人様，一瀬幸子様，金高遥様，萩原寛也様におかれましては，それぞれの進捗状況や 研究に対する姿勢から，これまでにない新しい刺激を受けることができました．研究 を最後まで続けることができたのも木下研究室の皆様のおかげだと感じています．心 より御礼申し上げます．また，多忙な時期に実験の協力者としてご協力頂いた方々に 心より感謝申し上げます．
本研究はもとより，今日に至るまで私を育て，大学生活の様々な場面において支え てくださった両親，家族に深く感謝いたします．
最後に，本研究は多くの方々の御指導，御協力によって最後までやり遂げることが できました．皆様に改めて深く感謝申し上げます．
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付 録 A 振動パターン収集実験で用い た資料と実験データ
本論文3章の振動パターン収集実験において，実験協力者に提示した実験教示書を 図1に示す．そして，図2–31に各実験協力者が各印象語に対して生成した振動パター ンを示す．最後に，表1に各実験協力者が振動パターンを生成した際のコメント一覧 を示す．
1
振動パターン導出実験
1. 実験概要
実験にご協力いただきありがとうございます．この実験は，振動パターン生成システム を用いて，振動パターンを収集することを目的とする実験です．実験協力者の方には感性 語を提示したうえで，その印象に合致した振動を作成していただきます．
2. 実験準備
振動パターン生成システムは，PC 上で振動のパラメータを調整し，図 1 の振動デバイス を通してその都度で振動を確認できるシステムです．実験の前段階として，振動パターン 生成システムの操作方法を 1 分間程度のビデオにて説明させていただきます．実験開始直 前にシステムに慣れるための時間を 3 分間設けますので，この段階ですべての操作を理解 する必要はありません．
※振動デバイスは利き手と逆の手で保持してください（右利きの場合，左手で保持）．
※振動デバイスは肌色の面を上にした状態で保持してください．
※画面右上の黄色の【 】で囲まれた数字は実験協力者番号なので実験に関係はありません．
図 1: 振動デバイス
2 3. 実験方法
※実験中はイヤーマフを装着していただきます．
(a) 図 2 のパラメータ変更画面の上部に感性語対が提示されます．感性語対とは，反対の 意味をもつ 2 つの感性語からなる組み合わせです．実験中は 2 つの内どちらか一方が 黄色く大きな字で表示されるので，その感性語の印象に合致した振動パターンを作成 してください．
※図 2 の場合，「はっきりとした」をイメージする振動パターンを作成します．
(b) 「Check Vibration」ボタンを押して振動を確認しながら，ビデオで説明したように 提示された感性語をイメージする振動パターンの作成を行います．
※一度も振動を確認することなく作成を終了することはやめてください．
※実験中は何度でも振動を確認していただいて構いません．
※横軸を時間いっぱい（1000 ms）使わなくても構いません．
(c) 作成終了後，振動パターン生成システムのキーボードの「Enter」キーを押すと図 3 の実験待機画面に遷移するので，実験担当者に作成を終えたことを知らせてください．
(d) 実験待機画面表示中，実験担当者に口頭にて作成した振動パターンがどのような振動 か，提示された感性語を使わずに説明していただきます．
※説明内容はボイスレコーダーにて記録させていただきます．
(e) 振動を説明後，隣に用意するサブ PC にて図 4 に示す評価画面の質問に回答していた だきます．質問内容は「自分が生成した振動パターンは提示された感性語にふさわし いパターンである．」です．感性語の提示方法は図 2 と同様で，サブ PC のキーボード にて 1～7 の数字の中からふさわしいと思う数字を入力すると図 5 のように選択中の 数字が黄色く表示されるので，「Enter」キーにて確定します．
※確定するまでは何度でも数値を変更することができます