Generative Creativity - lecture 14:
Aesthetics

Introduction

Aesthetics is the study of beauty and taste.

Also, the study of psychological processes which underlie aesthetic response.

The word comes from the Greek `aisthetikos', meaning `of sense perception.'

People studying aesthetics seek to understand why some things produce positively valued reactions whereas others arouse negatively valued ones.

Why are we drawn to certain images and artefacts and repelled by others?

Very hard question.... but of central importance for GC.

Simple associations

Attractive rural scene (William W. Gosling `A Hot Day in the Harvest Field')

Semi-abstract art

Turner's `river and bay'

Fully abstract art

Fully abstract art effectively eliminates most of the simpler explanations of what aesthetic response is about (sex, virtual-windows, associations, status etc.)

Kandinsky

Objective or subjective?

Beauty purely in the mind of beholder?

Just a matter of taste?

Different cultures show specific likes and dislikes.

Western societies more interested in `zooming in' on detail.

Eastern societies more responsive to plenty of context.

Is aesthetic experience a completely subjective property?

To a considerable degree, people do tend to respond in similar ways.

Physical attractiveness

Considerable evidence that people have essentially universal standards of beauty, including large eyes, `baby face' features, symmetric faces, so-called average faces, and specific waist-hip ratios.

But this doesn't seem to get even close to the kinds of extremely delicate discriminations that people make between `attractive' and `not attractive'.

It's tempting to dismiss differences in response as purely subjective/culturual/social.

But the consistency shown in making context-free judgements suggests some more objective basis.

Neuroaesthetics

Emerging evidence (often using fMRI imaging) suggests a reliable association between certain types of aesthetic experience (e.g., a pleasing abstract image) and the `lighting up' of certain areas of the brain.

Semir Zeki's work at UCL has demonstrated relations between certain abstract works of visual art and neurones in the brain that detect movement, direction and colour.

Novelist A S Byatt, writing in the Times Sep 22 2006, speculates that in the case of aesthetic response to narrative and poetry this `lighting up' may be the activity of mirror neurons (cells in the frontal lobes of monkeys which fire not only when the monkey performs an action, but when it observes the same action performed by another.)

And the link seems to work both ways....

Research which combines fMRI scanning with traditional questionaire methods has suggested that `creative types' have trademark patterns of brain activity, such as ``significantly higher activation in right and left cerebellum and in right and left frontal and temporal lobes, confirming inter-hemispheric interactions'' when engaged in a creative task.

Traditional principles

For images, aesthetic qualities appear to depend to some extent on `seeability', i.e., how easy it is to interpret the image.

Critical objects fully visible, not obscured by clutter, in the centre, informative lighting textures, clustering of salient entities etc.

But breaking such basic `rules' then becomes the means of achieving a different sort of aesthetic property, e.g., Bush pictured disapearing off the edge of the picture in a recent Time magazine cover.

Color

In art theory, there are notions of colour harmony.

These are essentially formalizations of preferences for colour combinations.

Key principle of `hue similarity', i.e,. we tend to prefer combinations of close hues.

But with `cool' colours there is more tolerance (where cool equates to saturation or intensity).

Principles of contrast, e.g., warm colours systematically preferred on cool backgrounds.

But significant variation in the degree to which people prefer harmonious colors.

Indeed, some people highly prefer contrastive colours.

Personality correlation

Contrastive preferences are statistically linked to personality type.

Principles of proportion

There is a long tradition relating to preferences for certain archetypal proportions.

In particular, the golden ratio.

Two values are in the golden ratio if the ratio between them is equal to ratio between sum and largest value.

Also known as the `divine proportion', `golden mean', `golden section.'

This ratio observed in large-scale constructions from the ancient world, e.g., Giza pyramids and the parthenon.

Golden ratio and the human body

The ratio also correlates with observed proportions for the human body.

and the face...

Aesthetics in non-visual genres

Is there any way to relate aesthetic preferences in the visual domain to other types?

Is there any connection between preference for colour harmony and preference for tonal harmony?

If such connections do exist, is there any way of relating these back to cognitive considerations?

Summary

Resources

Aesthetics in perception: http://www.androidblues.com/visualperception.html


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