The Establishment And Research Of The Two-hand Interactive Click Task Model In The Pen + Touch Interface

Human ergonomic models have important theoretical significance for the development of human-computer interaction.The validity of the Fitts’ law model has been widely accepted by most researchers in the traditional user interface.The success of the Fitts’ law is that it accurately describes on the level of input devices such as a single pointing task of mouse and so on.The model accurately reflects the linear relationship between the pointing movement time(MT)and task index of difficulty(ID).And Fitts’ law becomes the theoretical basis to guide the design of the user interface,is widely used as a new technology,new equipment and human-computer interaction(HCI)theory tool for the assessment of the new method.In the pen + touch interaction,bimanual pointing task is one of the most basic interaction tasks,but also the basic components of other interactive operation.Pen + touch pointing tasks can be divided into asynchronous and synchronous types according to the time sequence of the two targets.Asynchronous type refers to the targets appear in different stages of the operation asynchronously,synchronous type refers to the targets appear at the same time when operation starts.However,there is a lack of such a widely accepted ergonomic model for describing the relationship between the index of difficulty and the movement time in pen + touch interaction.The purpose of this paper:To research,propose and verify the pen + touch bimanual pointing ergonomic models.The main contents of this paper are as follows:1.First of all,we simulated the two kinds of pen + touch bimanual pointing tasks in one dimensional condition in experiment 1 and experiment 2.And then,we verified the effectiveness and applicability of Fitts’ law under these two conditions(asynchronous or synchronous).Through the two experiments,we found that Fitts’ law could not be used to describe the relationship between ID and MT in both two kinds of pen + touch bimanual pointing tasks.2.Through observing participants in experiment 1,we assumed and put forward the concept of reaction time and the ergonomic model for pen + touch bimanual pointing tasks in asynchronous conditions.Later,we verified the existence of reaction time in this model by experiment 3.And the reaction time is independent of the directions of the pointing tasks.Then,we prove that the model has a strong effectiveness and applicability in the context of experiment 4 and the existence of reaction time in this model was further verified.3.We assumed and put forward the ergonomic model for pen + touch bimanual pointing tasks in synchronous conditions through the analyses of experiment 1,experiment 2 and experiment 4.The effectiveness and applicability of this model are verified by experiment 5.4.Finally we proposed and verified the pen + touch bimanual pointing ergonomic models for both asynchronous and synchronous conditions and prospected for our research from the field of the human-computer interaction and ergonomics.