Cognitive affordances of South Scandinavian Mesolithic portable art as inferred from complexity and entropy measures

Key findings from this study

• The study found that visual complexity in portable art peaked during the Middle Mesolithic before declining in the Late Mesolithic period.
• The researchers demonstrate that information content in decorative motifs increased gradually and consistently across the entire Mesolithic sequence.
• The authors report that stylistic developments follow non-linear trajectories, inconsistent with models of simple cultural accumulation over time.

Overview

This study applies computational analysis to South Scandinavian Mesolithic portable art to infer cognitive affordances and social functions of ornamentation. The authors quantified decorative patterns using Shannon information entropy and perimetric complexity measures. Findings reveal non-linear temporal trajectories in stylistic development, suggesting shifts in societal functions of ornaments aligned with environmental and demographic changes.

Methods and approach

The researchers calculated Shannon information entropy and perimetric complexity for anthropogenic ornamentation on archaeological artefacts. These computational measures quantify information content and visual complexity respectively. The analysis mapped diachronic developments in motif morphology across the Mesolithic period. Morphological traits subjected to selective pressure were examined within a cognitive affordance framework to infer social functions.

Results

Visual complexity peaked during the Middle Mesolithic, while information content showed a slight, gradual increase throughout the period. The temporal distribution of stylistic traits across the Mesolithic demonstrates non-linear rather than linear development patterns. Notably, Late Mesolithic assemblages exhibit specialisation in motif usage despite lower overall visual complexity than Middle Mesolithic examples.

Implications

The findings indicate that ornamental practices underwent fundamental functional shifts during the Mesolithic. These shifts correspond broadly with environmental and demographic changes documented for the region, suggesting external drivers of stylistic evolution. The cognitive affordance framework successfully bridges computational analysis and interpretative archaeology, enabling inference of social function from morphological variation without direct ethnographic analogy.

The non-linear trajectory challenges assumptions of gradual cultural accumulation. The Middle Mesolithic peak in visual complexity followed by Late Mesolithic specialisation suggests distinct cultural priorities across periods. This pattern implies that decorative elaboration and motif diversity responded to changing social contexts rather than monotonic intensification.

Scope and limitations

This summary is based on the study abstract and available metadata. It does not include a full analysis of the complete paper, supplementary materials, or underlying datasets unless explicitly stated. Findings should be interpreted in the context of the original publication.