In response to a user access request, a media object containing a plurality of media components is constructed and transmitted to the user. At least one of the media components has been categorized as having different degrees of relevance to humans from a first culture/geographical location and humans from a second culture/geographical location. The user is prompted to solve a puzzle by selecting one or more of the media components or rearranging a location, size, appearance, or orientation of one or more of the media components. A description of an action performed by the user in response to the prompting is obtained. A determination is made, based on the obtained description of the action performed by the user, whether the user is more likely to be a human from the first culture/geographical location or a machine or a human from outside the first culture/geographical location.