Skip to main content
. Author manuscript; available in PMC: 2020 Oct 1.
Published in final edited form as: Dysphagia. 2018 Nov 28;34(5):640–653. doi: 10.1007/s00455-018-9962-z

Table 2.

Design of Experimental Conditions and Measures

Independent
Factors		 Testing
order		 Counterbalanced
Conditions		 Constants Dependent measures
Frequency Day 1

  • 30 Hz

  • 70 Hz

  • 110 Hz

  • 70 + 110 Hz*

  • 150 Hz

  • Sham

  • 4 kPA pressure

  • Continuous vibration

  • Swallow rate (Sw/min) during stimulation periods

  • Swallow rate (Sw/min) during nonvibration periods

  • Participant perception of urge to swallow on VAS

  • Participant perception of discomfort on VAS
Pressure Day 2

  • 2 kPa

  • 4 kPa

  • 6 kPa

  • Optimal frequency for individual participant

  • Continuous vibration
Mode Day 3

  • Continuous vibration

  • 4 Hz pulsed vibration (Figure 2)

  • Optimal frequency for individual participant

  • 4 kPA pressure
*

Refers to specific motor with 70 Hz motor on one side and 110 Hz motor on the other side.

VAS: Visual Analogue Scale; Hz: Hertz; kPa: kilopascals