Positive Bias:

acknowledges, agrees, emphasizes, confirms

Neutral Bias:

advises, allows, believes, claims, concludes, concurs, describes, discusses, expresses, interprets, lists, observers, offers, remarks, replies, responds, reveals, says, states, suggests, think, writes

Negative Bias:

asserts, charges, criticizes, declares, disagrees, disputes, objects, opposes, remarks, reports