Tag Archives: Human Computer Interaction

Smart phone UI occupies eyes/hand more than PC

Smart phone user interface is simpler to that of PC. But it worsens in one aspect of PC user interface.

PC user interface is complex.  For example, mouse has right click button which many users (like my wife) don’t care about. keyboard has many function keys which many users don’t care about.  PC screen shows many objects in tool-bars/menus which many users don’t know their meanings.

On the other hand, Smart phone (or WEB) offers “see and select” user interface. Users has only to see several objects(icons or texts) and select one of them, and repeat it. Moreover it’s a direct manipulation by finger. This simplicity of user interface, besides mobility, must be the major factor of the boarder adoptions.

By the way, PC user interface heavily relies on hands/fingers to give information to computers, and eyes to get information from computers.

Smart phone has smaller screen. Users must be more focused on the smaller screen. Smart phone is mobile but users must hold it in one hand and operate on it by the other hand. That is, smart phone occupies user’s eyes and both hands more than PC. It worsens PC user interface in a sense.

Voice interaction is going to make eye/hand free, but its use is limited to closed environments.

It industry should offer better user interaction.



Car driving as a human machine interaction model

While you are driving a car, you do the followings in parallel.

  • watch forward of the read, get feedback of your action
  • hear outside sounds
  • manipulate handle by hand and brake/accelerator bu foot
  • talk with passenger seat person

You sight organ, audio organ, and body motor systems are working in parallel, even two parts of body motor systems are working in parallel, and you can achieve your goal to get some place.

How wonderful the power of the human being is!

On the contrarily,  current human computer interaction is very limited and naive. It doesn’t take advantage of the human power as above:  You give information only by hand, and get information only by sight of 2D, serially. Voice interaction is going to add another channel b/w human and machine, but the channel is isolated from the others.


Mouse miss-match with finger dexterity

Fingers move finer than wrists. Wrists move finer than hands. The subtlety of human muscle control is Fingers>Wrists>Hands.

All the human great tools in the history, scissors, chopstickes, pens, etc rely on and take advantages of synthesis of finger/wristshands.

Traditional computer gadget, Mouse, failed to take advantage of human muscle natural powers, because

  1. Mouse uses wrists/hands for pointing and finger click for commanding but pointing requires more subtlety than commanding.
  2. Hands for point and finger for commanding are separately used and they are not the synthesis of each powers.

Microsoft Surface dial looks to try taking advantage of finger for pointing too. If it is true, it would be one of great progresses from the mouse.

Touch gets me tired more easily than mouse with wide screens

Touch is great because we don’t need the artifact (mouse) to bring around and operation is direct on object.

However the muscle movement for touch is bigger than the finger movements with mouse. For example, WEB page navigation with a tablet get me tired more easily than PC/mouse. I don’t like mouse, though I respect the invention. But touch user interface needs a improvement in some areas. Or finger tip user experiuence can be more improved.  

Finger dexterity has a miss-match in the current Human Computer Interaction

When we review current human computer interactions, we find fingers/hands is used for almost every input – commanding, texting, and pointing.

Fingers are overloaded. However seeing is faster than finger to point in 3D, speaking is faster than finger in texting. Fingers are used for commanding (menu/icon selection, etc). But the operations are rather verey simple ones.

On the other hand, fingers are very dexterious. Fingers can manupilate pens, chop sticks, scissors, chisels, etc. Current human computer interaction has not taken the advantage of this dexterity. We could image future robot/machine work with the dexterious fingers.

At this moment, fingers have a big miss-match between its power and the usage in human machine interaction.

I added this obsevation in http://www.slideshare.net/Hagezaru/human-receptors-effectors-and-human-machine-interactions.