1. A method, comprising: detecting an orientation change of a handheld computing device from a starting orientation to an ending orientation, the starting orientation and the ending orientation being angular orientations relative to a first reference; detecting a relative position change of the handheld computing device from a starting relative position to an ending relative position, wherein the relative position change occurs at a same time as the orientation change, the starting relative position and the ending relative positions being positions relative to a user; and querying, via a logic circuit, an index associating a plurality of spatial condition change combinations with respective likelihoods indicative of user attentiveness to a presentation on the handheld computing device to determine if the index includes an entry having both the detected orientation change and the detected relative position change.