Dataset Information

The Delaware Pain Database: a set of painful expressions and corresponding norming data.

ABSTRACT:

Introduction

Facial expressions of pain serve an essential social function by communicating suffering and soliciting aid. Accurate visual perception of painful expressions is critical because the misperception of pain signals can have serious clinical and social consequences. Therefore, it is essential that researchers have access to high-quality, diverse databases of painful expressions to better understand accuracy and bias in pain perception.

Objectives

This article describes the development of a large-scale face stimulus database focusing on expressions of pain.

Methods

We collected and normed a database of images of models posing painful facial expressions. We also characterized these stimuli in terms of the presence of a series of pain-relevant facial action units. In addition to our primary database of posed expressions, we provide a separate database of computer-rendered expressions of pain that may be applied to any neutral face photograph.

Results

The resulting database comprises 229 unique (and now publicly available) painful expressions. To the best of our knowledge, there are no existing databases of this size, quality, or diversity in terms of race, gender, and expression intensity. We provide evidence for the reliability of expressions and evaluations of pain within these stimuli, as well as a full characterization of this set along dimensions relevant to pain such as perceived status, strength, and dominance. Moreover, our second database complements the primary set in terms of experimental control and precision.

Conclusion

These stimuli will facilitate reproducible research in both experimental and clinical domains into the mechanisms supporting accuracy and bias in pain perception and care.

SUBMITTER: Mende-Siedlecki P

PROVIDER: S-EPMC7587421 | biostudies-literature | 2020 Nov-Dec

REPOSITORIES: biostudies-literature

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Publications

The Delaware Pain Database: a set of painful expressions and corresponding norming data.

Mende-Siedlecki Peter P Qu-Lee Jennie J Lin Jingrun J Drain Alexis A Goharzad Azaadeh A

Pain reports 20201021 6

<h4>Introduction</h4>Facial expressions of pain serve an essential social function by communicating suffering and soliciting aid. Accurate visual perception of painful expressions is critical because the misperception of pain signals can have serious clinical and social consequences. Therefore, it is essential that researchers have access to high-quality, diverse databases of painful expressions to better understand accuracy and bias in pain perception.<h4>Objectives</h4>This article describes t ...[more]

PMID: 33134750

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Project description:ObjectiveTo compare bladder sensitivity between patients with pelvic pain and patients who were pain free, undergoing noninvasive, controlled bladder distension via diuresis. We also sought to measure potential mechanisms underlying bladder sensitivity.DesignProspective observational study.SettingCommunity teaching hospital.PopulationReproductive-age women with non-bladder chronic pelvic pain (CPP, n = 23), painful bladder syndrome (PBS, n = 23), and pelvic pain-free controls (n = 42) METHODS: Participants were compared on cystometric capacity, pelvic floor pressure-pain thresholds (PPTs), pelvic muscle function, O'Leary-Sant bladder questionnaire, and psychosocial instruments using Wilcoxon rank-sum tests. Multivariate regression was used to identify factors underlying bladder pain phenotypes.Main outcome measuresPelvic floor pain thresholds; self-reported bladder distension pain.ResultsParticipants with PBS exhibited higher bladder distension pain than those with CPP, with both groups reporting higher pain levels than controls (P < 0.05). No significant associations were found between bladder distension pain and pelvic muscle structure or pain sensitivity measures; however, bladder distension pain positively correlates with both vaginal PPTs adjacent to the bladder (r = 0.46) and pain with transvaginal bladder palpation (r = 0.56). Pain at maximal distension was less influenced by somatic sensitivity than bladder symptoms (r = 0.35 versus r = 0.59; P < 0.05). Multivariate regression identified three independent components of bladder symptoms in PBS: bladder distension pain, bladder sensation, and somatic symptoms.ConclusionsDiuresis-induced bladder pain differentiates CPP from PBS. Experimental bladder pain is not predicted by pelvic floor sensitivity. Compared with patient-reported outcomes it appears less influenced by psychological factors. Further study is needed to determine whether screening for experimental bladder pain sensitivity could predict future risk of PBS.Tweetable abstractControlled, water ingestion-provoked bladder pain can objectively identify visceral pain sensitivity.

Dataset Information

The Delaware Pain Database: a set of painful expressions and corresponding norming data.

Introduction

Objectives

Methods

Results

Conclusion

Publications

The Delaware Pain Database: a set of painful expressions and corresponding norming data.

Similar Datasets

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