Influence of Screen Sizes on Responses to Visual Analog Scales of Stress (SIVAStress)

Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. However, the influence of screen sizes on responses to visual analog scales were never studied.

Study Overview

• Status: Recruiting
• Conditions: Volunteers
• Intervention / Treatment: Other: Influence of screen sizes on responses to visual analog scales of stress

Detailed Description

Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. However, the influence of screen sizes on responses to visual analog scales were never studied.

Primary objective is to study the influence of screen sizes on response responses to visual analog scales.

Secondary objectives are to assess:

• the variability of responses depending on screen sizes within a week
• the influence of perception of work and addiction to work on the variability depending on screen sizes
• relationships with biomarkers of stress : salivary DHEAS, heart rate variability and skin conductance

An open questionnaire will be created by the Clinical Research Direction. The questionnaire will be opened by the examinator who will fulfill the anonymized identification of participants and the type of screens. In a dedicated room at the LaPSCo, the participants will answer the same VAS on four different sizes/types of screens (24-inch screen, laptop, tablet, smartphone) and on paper. Saliva will be collected after answering questionnaires. Heart rate variability and skin conductance will be measured with the use of a wrist watch during 15 minutes, from the entrance in the room to the completion of questionnaires.

The participant will undergo the same examination within a week (15 minutes).

• Study Type: Observational
• Enrollment (Estimated): 200

Contacts and Locations

• Study Contact: Name: Lise Laclautre; Phone Number: 334.73.754.963; Email: promo_interne_drci@chu-clermontferrand.fr

Study Locations

• France
  • Clermont-Ferrand, France, 63003
    • Recruiting
    • Chu Clermont Ferrand
    • Principal Investigator: Frédéric DUTHEIL
    • Contact: Lise Laclautre; Email: promo_interne_drci@chu-clermontferrand.fr

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

healhy volunteers

Description

Inclusion Criteria:

• Adult persons

Exclusion Criteria:

• Refusal to participate in the study
• Unable to answer basic questions (difficulties understanding, cognitive disorders…)

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Cross-Sectional

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

Intervention / Treatment

experimental group; differences in responses to visual analog scales depending on screen sizes

Other: Influence of screen sizes on responses to visual analog scales of stress; An open questionnaire will be created by the Clinical Research Direction. The questionnaire will be opened by the examinator who will fulfill the anonymized identification of participants and the type of screens. In a dedicated room at the LaPSCo, the participants will answer the same VAS on four different sizes/types of screens (24-inch screen, laptop, tablet, smartphone) and on paper. Saliva will be collected after answering questionnaires. Heart rate variability and skin conductance will be measured with the use of a wrist watch during 15 minutes, from the entrance in the room to the completion of questionnaires. The participant will undergo the same examination within a week (15 minutes).

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Visual analog scale to assess the perceived stress	Visual analog scale to assess the perceived stress on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)	day 0
Visual analog scale to assess the perceived stress	Visual analog scale to assess the perceived stress on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)	day 7

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Visual analog scale to assess anxiety	Visual analog scale to assess anxiety on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)	day 0, day 7
Visual analog scale to assess sleep quality	Visual analog scale to assess sleep quality on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)	day 0, day 7
Visual analog scale to assess fatigue	Visual analog scale to assess fatigue on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)	day 0, day 7
Job Demand-Control-Support (JDSC) questionnaire of Karasek	The Job Demand-Control-Support (JDSC) questionnaire of Karasek assessed job demands, job control and social support through 26 items.	day 0, day 7
The Effort-Reward Imbalance Questionnaire (ERI)	The Effort-Reward Imbalance Questionnaire (ERI) is a self-administrated test assessing psychological distress and health problems that may occur when there is an imbalance between the efforts required by the work and the rewards received.	day 0, day 7
The Work Addiction Risk Test (WART)	The Work Addiction Risk Test (WART) was developed by Robinson et al. from symptoms reported by clinicians caring for patients with work addiction	day 0, day 7
Hospital Anxiety and Depression (HAD) Scale	Hospital Anxiety and Depression (HAD) Scale is a self-reported questionnaire composed of 14 items with a 4-point Likert scale assessing anxiety (7 items) and/or depressive (7 items) symptoms	day 0, day 7
The Maslach Burn-out Inventory (MBI)	The Maslach Burn-out Inventory (MBI) is composed of 22 items designed to assess the three components of the burn-out syndrome: emotional exhaustion (9 items), depersonalization (5 items) and reduced personal accomplishment (8 items)	day 0, day 7
Heart rate variability	Heart rate variability and skin conductance will be measured with the use of the wristband Empatica E4, Italy	day 0, day 7
: skin conductance	Heart rate variability and skin conductance will be measured with the use of the wristband Empatica E4, Italy	day 0, day 7
Salivary DHEAS	Salivary DHEAS is a biomarker of chronic stress, with a long half-life of 16 hours	day 0, day 7

Collaborators and Investigators

• Sponsor: University Hospital, Clermont-Ferrand
• Collaborators: Institut de Médecine du Travail; UMR CNRS 6024, LaPSCo
• Investigators: Principal Investigator: frédéric Dutheil, University Hospital, Clermont-Ferrand

Study record dates

Study Major Dates

• Study Start (Actual): March 2, 2021
• Primary Completion (Estimated): March 1, 2028
• Study Completion (Estimated): March 1, 2028

Study Registration Dates

• First Submitted: July 26, 2019
• First Submitted That Met QC Criteria: July 30, 2019
• First Posted (Actual): July 31, 2019

Study Record Updates

• Last Update Posted (Actual): February 12, 2026
• Last Update Submitted That Met QC Criteria: February 11, 2026
• Last Verified: February 1, 2026

More Information

Terms related to this study

• Keywords: stress; visual analog scale
• Other Study ID Numbers: RNI 2018 DUTHEIL 3; 2018-A03280-55 (Other Identifier: 2018-A03280-55)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No