Here are some scales with references that you may find useful to your study:

BRAND ENGAGEMENT SCALE:

1. I have a special bond with the brands that I like.

2. I consider my favorite brands to be a part of myself.

3. I often feel a personal connection between my brands and me.

4. Part of me is defined by important brands in my life.

5. I feel as if I have a close personal connection with the brands I most prefer.

6. I can identify with important brands in my life.

7. There are links between the brands that I prefer and how I view myself.

8. My favorite brands are an important indication of who I am.

Reliability:

The alphas for the scale in the other studies reported by Sprott, Czellar, and Spangenberg (2009) ranged from .91 to .93. The temporal stability of the scale was also examined and found to be good. Specifically, the two-month test-retest correlations were .62 (n = 118 university staff members) and .78 (n = 83 undergraduate students).

Reference:

Sprott, David, Sandor Czellar, and Eric Spangenberg (2009), “The Importance of a General Measure of Brand Engagement on Market Behavior: Development and Validation of a Scale,” Journal of Marketing Research, 46 (1), 92-104.

BRAND ATTITUDE SCALE:

1. This brand delivers what it promises.

2. This brand’s product claims are believable.

3. Over time, my experiences with this brand have led me to expect it to keep its promises, no more and no less.

4. This brand has a name you can trust.

5. This brand doesn’t pretend to be something it isn’t.

6. This brand is committed to delivering on its claims, no more and no less.

7. This brand has the ability to deliver what it promises.

Reliability:

Erdem and Swait (2004) reported an alpha of .89 for the scale. No reliability was reported by Erdem, Swait, and Valenzuela (2006).

References:

Erdem, Tulin and Joffre Swait (1998), “Brand Equity as a Signaling Phenomenon,” Journal of Consumer Psychology, 7 (April), 131-157.

Erdem, Tulin and Joffre Swait (2004), “Brand Credibility, Brand Consideration and Choice,” Journal of Consumer Research, 31 (June), 191-198.

Erdem, Tülin, Joffre Swait, and Ana Valenzuela (2006), “Brands as Signals: A Cross-Country Validation Study,” Journal of Marketing, 70 (1), 34-49.

BRAND COMMITMENT SCALE:

1. I will stay with this brand through good times and bad.

2. I am willing to make small sacrifices in order to keep using this brand.

3. I have made a pledge of sorts to stick with this brand.

Reference:

Breivik, Einar and Helge Thorbjørnsen (2008), “Consumer Brand Relationships: An Investigation of Two Alternative Models,” Journal of the Academy of Marketing Science, 36 (4), 443-472.

Best,

Khan

thanks a lot...this is definitely helpful to me.

There is a measurement instrument called BRANDpulse. We have used it and I have an access but only in Croatian, so I'll tr to explain it briefly.  It measures brand score (strength of the brand, 9 indicators), brand pyramid (relation of the customer toward brand; 6 indicators), Brand loyalty , general perception of the brand, and brand affinity.

Mirna Leko Šimić