The participants were asked about feelings of stress and tension throughout the day, a tendency to wake up at night, a need to be available to the cell phone, teeth-grinding and jaw pain.
Studies found that 54% of smartphone users wake up in the middle of the night, compared with 20% from the ultra-Orthodox population.
In addition, half of the secular respondents (50%) feel a moderate to high level of stress due to the cell phone, compared to only 22% among the ultra-Orthodox.