Finger test:
- If you pinch a fingernail-sized food sample (1.5 x 1.5 cm) between your thumb and index finger with enough force to turn your fingernail white, the food will be squashed or separated and will not return to its original shape after you release your fingers.
 
References:
The International Dysphagia Diet Standardization Initiative (IDDSI)
URL:https://iddsi.org/