Over the past nine weeks, we have featured a new psychological principle that marketers can use to improve their sales.

These principles are shortcuts that the human brain uses to make decisions, sometimes for better but not always. Most of them happen without us ever knowing. And when marketers know the tactics at their disposal to take advantage of these shortcuts, it can really help the bottom line.

In case you missed them, here are all nine parts to the Psychological Hacks for Marketers:

• Part 1 = Scarcity
• Part 2 = Confirmation Bias
• Part 3 = Anchoring
• Part 4 = Loss Aversion
• Part 5 = Urgency
• Part 6 = Reciprocity
• Part 7 = Authority
• Part 8 = Outcome Bias
• Part 9 = Bandwagon Effect

Stay tuned next week for a brand new series.