Bingo (8 years old) is an overfamiliar child. He talks to everyone that he comes across and does not mind disappearing with unfamiliar adults. Bingo goes around giving handshakes to strangers and telling them how great school is. He often gets astray. Hence, his grandmother has made it a habit to check on him every time he goes to play with other children. His grandmother attributes Bingo’s behaviour to the neglect that he suffered while in the care of his stepfather, who showed no regard for Bingo’s needs. Bingo is likely to be diagnosed with ---------------------.