Use of hand posture to improve text entry

One or more computer systems for classifying as an intended key a user keypress at a keypress location on a touch screen of a device, the user keypress being input by a user, the one or more computer systems comprising:

• one or more non-transitory computer-readable storage mediums for storing computer-executable instructions for controlling the one or more computer systems to:
• access, for each of plurality of hand postures, a touch pattern model for the user, the touch pattern model providing an underlying keyboard layout that is different from a virtual keyboard layout of a virtual keyboard that is displayed to the user, the underlying keyboard layout being based on a probabilistic distribution for each key derived from typing data collected from one or more users wherein the underlying keyboard layout for each hand posture is based on a predicted keypress location for keys of the virtual keyboard;
• and
• display the virtual keyboard on the touch screen, the virtual keyboard being independent of hand posture of the user and the underlying keyboard layout;
• identify the hand posture of the user based on characteristics of touches as the user interacts with the virtual keyboard;
• receive an indication of the keypress location on the virtual keyboard;
• and
• determine the intended key based on the keypress location and a touch pattern model for the identified hand posture wherein the intended key is derived from the predicted keypress locations as represented by the underlying keyboard layout of that touch pattern model;
• and
• one or more processors for executing the computer-executable instructions stored in the one or more non-transitory computer-readable storage mediums.