Negation is often found more frequent in dialogue than commonly written texts, such as literary texts. Furthermore, the scope and focus of negation depends on context in dialogues than other forms of texts. Existing negation datasets have focused on non-dialogue texts such as literary texts where the scope and focus of negation is normally present within the same sentence where the negation is ...

Although negation-free languages are widely used in logic and computer science, relatively little is known about their expressive power. To address this issue we consider a kind of non-symmetric bisimuIations called directed simulations, and use these to analyze the expressive power and model theory of negation-free modal and temporal languages. We first use them to obtain preservation, safety ...

The present research investigated the effects of negation on young and older adults’ comprehension of sentences. Participants read sentences, named probe words, answered comprehension questions, and completed the operation-span test. Negation adversely affected comprehension in both age groups such that probe word naming times were marginally slower and comprehension accuracy was reduced for ne...

In Danish the base position of the negation and negated quantifier phrases is between the subject and the finite verb in embedded clauses. However, in embedded clauses introduced by a non-veridical complementizer such as hvis (‘if’) or om (‘whether’) the negation and negated quantifier phrases can also appear between the complementizer and the subject. This phenomenon is referred to as preposed...

OBJECTIVE Automatically identifying findings or diseases described in clinical textual reports requires determining whether clinical observations are present or absent. We evaluate the use of negation phrases and the frequency of negation in free-text clinical reports. METHODS A simple negation algorithm was applied to ten types of clinical reports (n=42,160) dictated during July 2000. We cou...