USED TO SAY: - the number of alternatives to use is 4
-studies have shown that 5 are usually too many to think of --> four is tough enough -no hard and fast rule, but take my word for it, four makes best sense |
NOW SAY: Last 18 months a lot of new research is coming out that says, really, 3 is best. Math is way over my head but seems to be... argue 4th alternative is too hard, most teachers write rubbish.... |