Kapitel 8 UX of NUI

(kreiert von Gott -> er hat einfach mehr knowledge )

Frameworks provide structure and reusable components in GUI development, which:

• Accelerates implementation

• Encourages consistency across interfaces

• Can limit creativity if blindly followed 🧠 UX Implication: Frameworks support faster development, but may lead to interfaces focused on implementation ease rather than user-centered interaction unless UX is considered from the start.

(kreiert von Gott -> er hat einfach mehr knowledge )

From a UX perspective:

• Frameworks should be adapted to fit user needs, not the other way around.

• Designers must closely link gesture and interface development (Slide 6).

• The framework should support intuitive feedback, minimize false positives, and enable natural interaction flow.

(kreiert von Gott -> er hat einfach mehr knowledge )

(Not explicitly defined in one slide, but implied)

• Over-personalizing or creating different interactions for different users may lead to inconsistencies, higher learning curves, and unpredictability.

• It breaks the goal of self-descriptiveness and simplicity (Slides 9–10, 37–38).

• the system is doing sth even though you did nothing

• user learns through feedback -> false feedback given

• -> user is learning a possible wrong gesture

• dont know how to undo if system reactet to wrong gesture

Gott:

1. They cause actions to trigger without intent, breaking the sense of control.

2. Especially critical in NUIs where gestures are ambiguous or similar.

3. Result in frustration and confusion (Slide 5).

4. Slide 4 emphasizes avoiding primitive or easily confused gestures.

false positives (user doesnt know what he did, learns the wrong gesture)

• false negatives -> user does gesture again (not a problem)

Gott:

Slides focus more on false positives as more problematic:

• They trigger unwanted actions.

• Users may not know how to undo them.

• Slide 5 suggests closely analyzing both but emphasizes avoiding similar gestures and improving feedback to reduce false positives.

• Do not limit your ideation by the question "Will the user guess?"

  • Use this question to optimize your feedback

  • Create no primitive gestures on the basis of this question

• Take a closer look on false-negatives and false-positives

  • Try to understand the gesture recognition software

  • Inform the user by affordances

  • Avoid similar gestures

Gott:

From Slides 5–6 and 34–36:

• Minimize false positives/negatives

• Design gesture recognition closely with UI

• Focus on manipulation-based gestures

• Ensure cause-effect consistency

• Use affordances and self-descriptive design

• Carefully visualize gesture phases and system states

• people learn from feedback -> right feedback has to be given

• 
  

learning curve of shortcuts (gulf of competence)

• takes time / effort to learn better gesture for sth -> motivation to change is low

• transition (learning e.g. shortcut) should be supported

Gott weil ich hab kein brain:

Not directly discussed in the slides. However, the principle of context-sensitive linking (Slide 20) and movement-based states (Slides 22–24) imply:

• Different hands may perform different functions.

• Designers can consider assigning manipulation to the dominant hand, and menu/control gestures to the non-dominant hand, inspired by the concept of gesture layering.