Shota Yamanaka, Ph.D. in Engineering (Google Scholar)

Senior chief researcher at LY Corporation Research

Leader of the HCI group at LY Corporation Research

Research Interests

Human Computer Interaction, Graphical User Interface, User Interface, Pointing, Mouse Cursor Operation, Performance Modeling

Publications

Journal

1. Shota Yamanaka, Hiroki Usuba. 0.2-mm-Step Verification of the Dual Gaussian Distribution Model with Large Sample Size for Predicting Tap Success Rates. PACMHCI, Vol.8, No.ISS, Article 553, pp.674-693, 2024. [ACM] [PDF] (Acceptance rate 24.2%)

2. Shota Yamanaka. Deciding to Stop Early or Continue the Experiment After Checking p-Values at Interim Points: Introducing Group Sequential Designs to UI-Based Comparative Studies. International Journal of Human–Computer Interaction, 2024. [Taylor & Francis] [PDF] 

3. Shota Yamanaka, Homei Miyashita. Spatial Variability Models for Straight Pen-Stroking Tasks with Temporal Constraints. Journal of Information Processing, 2024.

4. Shota Yamanaka, Hiroki Usuba, Yosuke Oba, Taiki Kinoshita, Ryuto Tomihari, Nobuhito Kasahara, Homei Miyashita. Verifying Finger-Fitts Models for Normalizing Subjective Speed-Accuracy Biases. PACMHCI, Vol.8, No.MobileHCI, Article 285, pp.1-24, 2024. [ACM][PDF] 

5. Shota Yamanaka. Sample-size and Repetition Effects on the Prediction Accuracy of Time and Error-rate Models in Steering Tasks. Journal of Information Processing, Vol.32, pp.247-255, 2024. [DOI] [PDF]

6. Shota Yamanaka. Relative Merits of Nominal and Effective Indexes of Difficulty of Fitts' Law: Effects of Sample Size and the Number of Repetitions on Model Fit. International Journal of Human–Computer Interaction, Vol.XX, No.XX, pp.xx-xx, 2024. [Taylor & Francis] [PDF]

7. Taiki Kinoshita, Yosuke Oba, Ryuto Tomihari, Shota Yamanaka, Homei Miyashita. The Effect of Subjective Speed-accuracy Biases on the Generalizability of Pointing-facilitation Techniques Evaluation, IPSJ Journal, Vol.65, No.2, pp.383-395, 2024. [DOI] [Specially Selected Paper] 

8. Naoto Nishida, Kaori Ikematsu, Junichi Sato, Shota Yamanaka, Kota Tsubouchi. Single-tap Latency Reduction with Single- or Double- tap Prediction. PACMHCI, Vol.7, No.MobileHCI, Article 224, pp.1-26, 2023. [ACM] [PDF] 

9. Hiroki Usuba, Shota Yamanaka, Junichi Sato. Clarifying the Effect of Edge Targets in Touch Pointing through Crowdsourced Experiments. PACMHCI, Vol.7, No.ISS, Article 433, pp.156-174, 2023. [ACM] [PDF] 

10. Shota Yamanaka, Takumi Takaku, Yukina Funazaki, Noboru Seto, Satoshi Nakamura. Evaluating the Applicability of GUI-based Steering Laws to VR Car Driving: A Case of Curved Constrained Paths. PACMHCI, Vol.7, No.ISS, Article 430, pp.93-113, 2023. [Best paper honorable mention award] [ACM] [PDF] 

11. Shota Yamanaka, Hiroki Usuba,Haruki Takahashi, Homei Miyashita. Predicting Success Rates in Steering Through Linear and Circular Paths by the Servo-Gaussian Model. International Journal of Human–Computer Interaction, Vol.40, No.16, pp.4300-4318, 2023. [Taylor & Francis] [PDF] 

12. Takuma Hidaka, Yusuke Sei, Naoto Nishida, Shota Yamanaka, Buntarou Shizuki. Advanced Investigation of Steering Performance with Error-Accepting Delays. International Journal of Human–Computer Interaction, Vol.40, No.4, pp.3622-3635, 2023.  [Taylor & Francis] [PDF] 

13. Toshiya Isomoto, Shota Yamanaka, Buntarou Shizuki. Exploring Dwell-time from Human Cognitive Processes for Dwell Selection. PACMHCI, Vol.7, No.ETRA, Article 159, pp.1-15, 2023. [PDF] [ACM]

14. Shota Yamanaka, Hiroki Usuba, Wolfgang Stuerzlinger, Homei Miyashita. The Effectiveness of Path-segmentation for Modeling Lasso Times in Width-varying Paths. PACMHCI, Vol.6, No.ISS, Article 584, pp.640-659, 2022. [PDF] [ACM] [Presentation video (15 min)] 

15. Hiroki Usuba, Shota Yamanaka, Junichi Sato, Homei Miyashita. Predicting Touch Accuracy for Rectangular Targets by using One-Dimensional Task Results. PACMHCI, Vol.6, No.ISS, Article 579, pp.525-537, 2022. [PDF] [ACM] [Presentation video (12 min)] 

16. Toshiya Isomoto, Shota Yamanaka, Buntarou Shizuki. Dwell Selection with ML-based Intent Prediction Using Only Gaze Data. PACM IMWUT, Vol.6, No.3, Article 120, 2022. [PDF] [ACM]

17. Shota Yamanaka. Utility of Crowdsourced User Experiments for Measuring the Central Tendency of User Performance: A Case of Error-Rate Model Evaluation in a Pointing Task. Frontiers in Artificial Intelligence, Vol.5:798892, 2022. [PDF]  [Frontiers]

18. Shota Yamanaka, Hiroki Usuba. Computing Touch-Point Ambiguity on Mobile Touchscreens for Modeling Target Selection Times. PACM IMWUT, Vo.5, No.4, Article 186, 2021. [PDF] [arXiv] [ACM] 

19. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Modeling Movement Times and Success Rates for Acquisition of One-dimensional Targets with Uncertain Touchable Sizes. PACMHCI, Vo.5, No.ISS, Article 487, 2021. [PDF]  [ACM]  (Acceptance rate 29.9%)

20. Toshiya Isomoto, Shota Yamanaka, Buntarou Shizuki. Gaze-based Interaction Technique Robust Against Unintentional Activation using Dwell-then-Gesture. The Transactions of Human Interface Society, Vol.23, No.1, pp.5-18, 2021. [Link]

21. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Modeling Steering Performance for a Path Created by Orthogonally Connected Path Segments with Different Widths. IPSJ Journal, Vol.62, No.2, pp.574-584, 2021. [Link]

22. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Modeling Users' Pointing Performance with Different Motor and Visual Target Widths. IPSJ Journal, Vol.62, No.2, pp.585-593, 2021. [Link]

23. Shota Yamanaka, Hiroki Usuba. Rethinking the Dual Gaussian Distribution Model for Predicting Touch Accuracy in On-screen-start Pointing Tasks. PACMHCI, Vol.4, No.ISS, Article 205, 2020. [PDF] [ACM] (Acceptance rate 28.7%)

24. Shota Yamanaka, Wolfgang Stuerzlinger. Necessary and Unnecessary Distractor Avoidance Movements Affect User Behaviors in Crossing Operations. ACM Transactions on Computer-Human Interaction (TOCHI), Vol.27, No.6, Article 44, pp.1-31, 2020. [PDF] [ACM] [5-min presentation at CHI] 

25. Kaori Ikematsu, Shota Yamanaka. ScraTouch: Extending Interaction Technique Using Fingernail on Unmodified Capacitive Touch Surfaces. The Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Article No. 81, pp.1-19, 2020. [ACM DL]

26. Kaori Ikematsu, Shota Yamanaka, Kota Tsubouchi, Itiro Siio. Copernican-Touch: Extending Touch-Interaction Technique Using Motion of Touch Surface towards Finger. Computer Software, Vol.36, No.3, pp.20-32, 2019. [J-Stage]

27. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Pointing Performance on the Difference between Motor and Visual Widths. IPSJ Journal, Vol.60, No.4, pp.1184-1199, 2019. [PDF] [Link]

28. Shota Yamanaka, Homei Miyashita. Paper-cutting operations using scissors in Drury's law tasks. Applied Ergonomics, Vol.69, pp.32-39, 2018. [DOI] [PDF]

29. Kunihiro Kato, Shota Yamanaka, Homei Miyashita. 3D-printed Objects with 2D Touch Input. IPSJ Journal, Vol.59, No.2, pp.670-680, 2018. [LINK] [Specially Selected Paper]

30. Shota Yamanaka, Wolfgang Stuerzlinger, Homei Miyashita. Analyzing and Modeling the Steering Operations in Sequential Linear Path Segments. IPSJ Journal, Vol.59, No.2, pp.633-643, 2018. [LINK]

31. Shota Yamanaka, Homei Miyashita. A Study of the Steering Time Difference between Narrowing and Widening Circular Tunnels. Computer Software, Vo.33, No.4, pp.116-121, 2016. (Reprint: Information and Media Technologies, Vol.12, pp.40-45, 2017) [PDF] [DOI]

32. Shota Yamanaka, Homei Miyashita. Study on Pointing Targets with Infinite Size. IPSJ Journal, Vol.57, No.4, pp.1319-1329, 2016. [Link]

33. Shota Yamanaka, Homei Miyashita. A Method to Predict Steering Time in the Opposite Direction through a Path with Non-constant Width. IPSJ Journal, Vol.57, No.2, pp.794-802, 2016. [Link]

34. Shota Yamanaka, Homei Miyashita. A Support Technique to Begin Dragging Narrow Targets and its Evaluation. Computer Software, Vol.33, No.1, pp.111-125, 2016.  [PDF] [Link]

35. Shota Yamanaka, Homei Miyashita. Mouse Cursor Operation for Overlapped Windowing and Its Evaluation. The Transactions of Human Interface Society, Vol.15, No.3, pp.313-326, 2013. [PDF] [Link]

36. Shota Yamanaka, Kazutaka Kurihara, Homei Miyashita. Interaction Technique Using Non-Gaze Area for Fast Target Pointing and Its Evaluation. Computer Software, Vol.30, No.3, pp.53-63, 2013. [PDF] [Link]

Conference (oral)

1. Nobuhito Kasahara, Yosuke Oba, Shota Yamanaka, Anil Ufuk Batmaz, Wolfgang Stuerzlinger, Homei Miyashita. Better Definition and Calculation of Throughput and Effective Parameters for Steering to Account for Subjective Speed-accuracy Tradeoffs. In Proceedings of CHI 2024, No.722, pp.1-18. [PDF] [ACM] [14-min video] [30-sec video]   

2. Shota Yamanaka, Hiroki Usuba, Junichi Sato. Behavioral Differences between Tap and Swipe: Observations on Time, Error, Touch-point Distribution, and Trajectory for Tap-and-swipe Enabled Targets.  In Proceedings of CHI 2024, No.549, pp.1-12. [PDF] [ACM] [Video] 

3. Shota Yamanaka, Wolfgang Stuerzlinger. The Effect of Latency on Movement Time in Path-steering.  In Proceedings of CHI 2024, No.622, pp.1-19. [PDF] [ACM] [Video] 

4. Kota Tsubouchi, Kenta Taoka, Kaori Ikematsu, Shota Yamanaka, Koya Narumi, Yoshihiro Kawahara. Eye-tracking AD: Cutting-Edge Web Advertising on Smartphone Aligned with User's Gaze. In Proceedings of PerCom Industry Track 2024. [DOI] 

5. Masahiro Fukui, Takumi Takaku, Satoshi Nakamura, Shota Yamanaka. Evaluating the Applicability of GUI-based Steering Laws to Virtual Reality Car Driving: A Case of Width-Changing Paths. In Proceedings of OzCHI2023, pp.316-323. [PDF] [ACM]

6. Shota Yamanaka, Taiki Kinoshita, Yosuke Oba, Ryuto Tomihari, Homei Miyashita. Varying Subjective Speed-accuracy Biases to Evaluate the Generalizability of Experimental Conclusions on Pointing-facilitation Techniques. In Proceedings of CHI 2023, Article 317, pp.1-13.  (Acceptance rate 27.6%) [ACM] [PDF] [video (8 min)]

7. Shota Yamanaka, Hiroki Usuba. Tuning Endpoint-variability Parameters by Observed Error Rates to Obtain Better Prediction Accuracy of Pointing Misses. In Proceedings of CHI 2023, Article 579, pp.1-18. (Acceptance rate 27.6%) [ACM] [PDF] [video (9 min)] 

8. Yukina Funazaki, Noboru Seto, Kota Ninomiya, Kazuyuki Hikawa, Satoshi Nakamura, Shota Yamanaka. Driving Experiment System Using HMDs to Measure Drivers’ Proficiency and Difficulty of Various Road Conditions. In Proceedings of HCII 2022, Vol.LNCS 13335, pp.247–257, 2022. [Springer] [Slides] 

9. Shota Yamanaka. Test-retest Reliability on Movement Times and Error Rates in Target Pointing. In Proceedings of DIS 2022, pp.178-188. (Acceptance rate 21.5%) [PDF] [ACM] [30-sec video] [10-min video] 

10. Shota Yamanaka, Hiroki Usuba, Homei Miyashita. Bivariate Effective Width Method to Improve the Normalization Capability for Subjective Speed-accuracy Biases in Rectangular-target Pointing. In Proceedings of CHI 2022, No.211, pp.1-13. (Acceptance rate 24.7%) [PDF]  [ACM] [presentation video] 

11. Shota Yamanaka. Utility of Crowdsourced User Experiments for Measuring the Central Tendency of User Performance to Evaluate Error-Rate Models on GUIs. In Proceedings of HCOMP 2021, pp.155-165. [PDF]  [AAAI] 

12. Toshiya Isomoto, Shota Yamanaka, Buntarou Shizuki. Relationship between Dwell-Time and Model Human Processor for Dwell-based Image Selection. In Proceedings of SAP 2021, Paper No.6, pp.1-5. [ACM] 

13. Shota Yamanaka. Comparing Performance Models for Bivariate Pointing through a Crowdsourced Experiment. In Proceedings of INTERACT 2021, pp.76-92. (Acceptance rate 27%) [PDF]  [Springer]

14. Shota Yamanaka, Keisuke Yokota, Takanori Komatsu. Time-Penalty Impact on Effective Index of Difficulty and Throughputs in Pointing Tasks. In Proceedings of INTERACT 2021, pp.100-121. (Acceptance rate 27%) [PDF]  [Springer]

15. Shota Yamanaka, Hiroki Usuba, Haruki Takahashi, Homei Miyashita. Servo-Gaussian Model to Predict Success Rates in Manual Tracking: Path Steering and Pursuit of 1D Moving Target. In Proceedings of UIST 2020, pp.844-857. (Acceptance rate 21.6%) [ACM] [PDF] [5-min presentation] [30-sec video] 

16. Shota Yamanaka. Evaluating Temporal Delays and Spatial Gaps in Overshoot-avoiding Mouse-pointing Operations. In Proceedings of Graphics Interface 2020, pp.440-451. (Acceptance rate 51.7%) [GI Proc]

17. Shota Yamanaka, Hiroki Usuba, Haruki Takahashi, Homei Miyashita. Peephole Steering: Speed Limitation Models for Steering Performance in Restricted View Sizes. In Proceedings of Graphics Interface 2020, pp.461-469. (Acceptance rate 51.7%) [GI Proc]

18. Shota Yamanaka, Kunihiro Kato, Tung D. Ta, Kota Tsubouchi, Fuminori Okuya, Kenji Tsushio, Yoshihiro Kawahara. SheetKey: Generating Touch Events by a Pattern Printed with Conductive Ink for User Authentication. In Proceedings of Graphics Interface 2020, pp.452-460. (Acceptance rate 51.7%) [GI Proc]

19. Toshiya Isomoto, Shota Yamanaka, Buntarou Shizuki. Gaze-based Command Activation Technique Robust Against Unintentional Activation using Dwell-then-Gesture. In Proceedings of Graphics Interface 2020, pp.256-266. (Acceptance rate 51.7%) [GI Proc]

20. Shota Yamanaka, Hiroaki Shimono, Homei Miyashita. Towards More Practical Spacing for Smartphone Touch GUI Objects Accompanied by Distractors. In Proceedings of ISS 2019, pp.157-169. (Acceptance rate 30.6%) [PDF] [ACM]

21. Shota Yamanaka, Homei Miyashita. Modeling Pen Steering Performance in a Single Constant-width Curved Path. In Proceedings of ISS 2019, pp.65-76. (Acceptance rate 30.6%) [ACM]

22. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Comparing Lassoing Criteria and Modeling Straight-line and One-loop Lassoing Motions Considering Criteria. In Proceedings of ISS 2019, pp.181-191. (Acceptance rate 30.6%) [ACM] 

23. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Touch Pointing Performance for Uncertain Touchable Sizes of 1D Targets. In Proceedings of MobileHCI 2019, Paper No.20, 1-8. (Acceptance rate 26.4%) [PDF] [ACM]

24. Shota Yamanaka. Steering Performance with Error-accepting Delays. In Proceedings of CHI 2019, Paper No.570, pp.1-9. (Acceptance rate 23.8%) [Best paper honorable mention award] [PDF] [ACM]

25. Shota Yamanaka, Wolfgang Stuerzlinger. Modeling Fully and Partially Constrained Lasso Movements in a Grid of Icons. In Proceedings of CHI 2019, Paper No.120, pp.1-12. (Acceptance rate 23.8%) [PDF] [ACM]

26. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. Pointing to Targets  with Difference between Motor and Visual Widths. In Proceedings of OzCHI 2018, pp.374-383. (Acceptance rate 40%) [PDF] [ACM]

27. Shota Yamanaka. Risk Effects of Surrounding Distractors Imposing Time Penalty in Touch-Pointing Tasks. In Proceedings of ISS 2018, pp.129-135. (Acceptance rate 26.7%) [ACM DL]

28. Hiroki Usuba, Shota Yamanaka, Homei Miyashita. User Performance by the Difference between Motor and Visual Widths for Small Target Pointing. In Proceedings of NordiCHI 2018, pp.161-169. (Acceptance rate 24.5%) [PDF] [ACM]

29. Shota Yamanaka. Effect of Gaps with Penal Distractors Imposing Time Penalty in Touch-Pointing Tasks. In Proceedings of MobileHCI 2018, Article No.21, pp.1-11. (Acceptance rate 23.4%) [PDF] [ACM DL]

30. Shota Yamanaka. Mouse Cursor Movements towards Targets on the Same Screen Edge. In Proceedings of Graphics Interface 2018, pp.106-113. (Acceptance rate 42.9%) [PDF][DOI]

31. Shota Yamanaka, Wolfgang Stuerzlinger, and Homei Miyashita. Steering through Successive Objects. In Proceedings of CHI 2018, Paper No.603, pp.1-13. (Acceptance rate 25.7%) [ACM DL] [YouTube]

32. Shota Yamanaka, Wolfgang Stuerzlinger, and Homei Miyashita. Steering Through Sequential Linear Path Segments. In Proceedings of CHI 2017, pp.232-243, 2017. (Acceptance rate 25%) [PDF] [YouTube] [ACM DL] [DOI] [SlideShare]

33. Shota Yamanaka and Homei Miyashita. Scale Effects in the Steering Time Difference between Narrowing and Widening Linear Tunnels. In Proceedings of NordiCHI 2016, Article No.12. 2016. (Acceptance rate 22.8%). [PDF] [SlideShare] [ACM DL] [DOI]

34. Shota Yamanaka and Homei Miyashita. Modeling the Steering Time Difference between Narrowing and Widening Tunnels. In Proceedings of CHI 2016, pp.1846-1856. 2016. (Acceptance rate 23.4%). [PDF] [SlideShare] [YouTube] [ACM DL] [DOI]

35. Shota Yamanaka and Homei Miyashita. Vibkinesis: Notification by Direct Tap and ‘Dying Message’ Using Vibronic Movement Controllable Smartphones. In Proceedings of UIST 2014, pp.535-540. 2014. (Acceptance rate 22.2%) [YouTube] [ACM DL] [DOI]

36. Shota Yamanaka and Homei Miyashita. Switchback Cursor: Mouse Cursor Operation for Overlapped Windowing. IFIP INTERACT 2013. Lecture Notes in Computer Science Volume 8117, pp.746-753, 2013. (Acceptance rate 45%) [PDF]

Conference (demo, poster)

1. Nobuhito Kasahara, Yosuke Oba, Shota Yamanaka, Wolfgang Stuerzlinger, Homei Miyashita. Throughput and Effective Parameters in Crossing. CHI Late-breaking work, CHI 2023. [ACM] [PDF] [video (30 sec)] [video (3 min)] 

2. Toshiya Isomoto, Shota Yamanaka, Buntarou Shizuki. Interaction Design of Dwell Selection Toward Gaze-based AR/VR Interaction. ETRA 2022 poster. [ACM] [PDF] 

3. Kota Yokoyama, Satoshi Nakamura, Shota Yamanaka. Do Animation Direction and Position of Progress Bar Affect Selections? INTERACT 2021 poster, pp.395-399. [PDF]  [Springer] 

4. Wataru Oogami, Hidehito Gomi, Shuji Yamaguchi, Shota Yamanaka, Tatsuru Higurashi. Observation Study on Usability Challenges for Fingerprint Authentication Using WebAuthn-enabled Android Smartphones. SOUPS 2020 poster. (Acceptance rate 28.9%)

5. Kaori Ikematsu , Kota Tsubouchi , Shota Yamanaka. PredicTaps: Latency Reduction Technique for Single-taps Based on Recognition for Single-tap or Double-tap. CHI Late-breaking work, CHI 2020. [ACM]

6. Kaori Ikematsu , Shota Yamanaka. ScraTouch: Extending Touch Interaction Technique Using Fingernail on Capacitive Touch Surfaces. CHI Late-breaking work, CHI 2020. [ACM]

7. Shota Yamanaka and Homei Miyashita. The Nudging Technique: Input Method without Fine-Grained Pointing by Pushing a Segment. UIST 2013 Adjunct Publication, pp.3-4. ACM UIST 2013. Demonstration. (Acceptance rate 50%) [YouTube] [ACM DL]