Effects of color temperature of the light emitted by computer screens on cognitive performance, alertness and sleep quality among Emergency Control Room operators

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20180415039304N1

Enrollment

Registered

2018-05-11

Start date

2018-04-20

Completion date

Unknown

Last updated

2018-06-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

cognitive performance. Other symptoms and signs involving cognitive functions and awareness

Interventions

Intervention group: f.lux was installed on the operators ’computer screens. In order to use a one-way intervention, the software was installed during the opposit

Eligibility

Sex/Gender

Female

Age

20 Years to 45 Years

Inclusion criteria

Inclusion criteria: having more than 2 years of work experience , less than 45 years of age (due to the effect of aging on cognitive performance) being one of the night working operators of the Emergency Control Room who have been performing similar computer work for more than 4 hours a day

Exclusion criteria

Exclusion criteria:

Design outcomes

Primary

Measure	Time frame
Cognitive performance. Timepoint: before and after intervention. Method of measurement: cognitive performance software.	—

Secondary

Measure	Time frame
Sleep quality score. Timepoint: before and after intervention. Method of measurement: Pittsburgh Sleep Quality Index.	—

Countries

Iran (Islamic Republic of)

Contacts

Public Contactnegar alighanbari

Shiraz University of Medical Sciences

alighanbari@sums.ac.ir+98 71372510019

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026